Fastening device for fastening electro-hydraulic assembly and motor vehicle

Abstract

The invention relates to a fastening device (1) for fastening an electrohydraulic component (2), characterized in that the fastening device (1) has a tube (3) and at least one first support (4), second support (5) and third support (6), the first support (4) and the third support (6) each having a centering device or a first mounting opening (10) for rotatably mounting the tube (3).

Description

Technical Field

[0001] The invention relates to a fastening device for fastening an electrohydraulic component according to the preamble of claim 1. The invention further relates to a motor vehicle having an electrohydraulic component fastened to an axle frame by means of such a fastening device. Background Art

[0002] A similar fastening device for fastening an electrohydraulic component is known from DE 10 2018 122 226 A1, which is an auxiliary frame for mounting a motor-pump unit for an active hydraulic shock absorber on a motor vehicle subframe, wherein the auxiliary frame has a first end face, a second end face and a back face, and wherein the first end face is arranged substantially perpendicular to the back face and parallel to the second end face. In this case, the first end face has a channel for passing a hydraulic connector. This makes it possible to simplify the installation of the motor-pump unit in particular.

[0003] In order to improve the driver's behavior, so-called active hydraulic shock absorbers are used, in particular in more expensive motor vehicles, whose hardness or elasticity characteristics can be adjusted according to the desired driving mode. To operate such active hydraulic shock absorbers, a hydraulic pump is used, which is usually arranged in the chassis region, in particular in the axle frame region. When arranging such a hydraulic pump in the axle frame region or in the chassis region in general, the installation space required and the ease of installation are of great importance. In this case, the hydraulic pump must be connected to the chassis component or the vehicle body by means of a fastening device, wherein in particular the special circumstances of the different vehicle models, which are determined by the installation space, must also be taken into account.

[0004] A disadvantage of the fastening devices known from the prior art is that they require relatively large installation space and that the electrohydraulic components are relatively difficult to install, wherein in particular specific installation space conditions cannot be taken into account or can only be taken into account with difficulty. Summary of the invention

[0005] The present invention is therefore based on the problem of providing an improved or at least alternative embodiment of a fastening device of this type, by means of which a relatively simple and flexible installation of an electrohydraulic component is possible, in particular in a motor vehicle.

[0006] This problem is solved according to the invention by the subject matter of independent claim 1. Advantageous embodiments are the subject matter of the dependent claims.

[0007] The invention is based on the following general idea: to design a fixing device for fixing an electrohydraulic component, such as a motor-pump unit for an active hydraulic shock absorber / damper, so that it can be rotated at least in a limited manner and can be easily adjusted under different installation conditions to adapt to the specific design reality of the chassis, in particular the axle frame. In this case, the fixing device according to the invention for fixing the electrohydraulic component has a pipe and at least a first bracket, a second bracket and a third bracket, wherein the first bracket and the third bracket each have a centering device or a first mounting opening for rotatably supporting the pipe. The second bracket and the third bracket are each connected to the electrohydraulic component to be fixed in a torsion-proof manner in the installed state, for example, they are screwed together. By arranging the pipe between the first bracket and the third bracket in the first mounting opening of the first bracket and the third bracket respectively, the first bracket can be easily rotated relative to the pipe and relative to the second bracket and the third bracket, and then the electrohydraulic component can be rotated relative to the first bracket, so that the installation process, i.e. the process of installing the electrohydraulic component on the chassis of the motor vehicle by the fixing device, can be significantly simplified. Furthermore, the fastening device can be easily adapted to different design specificities by simply shortening the length of the tube, so that it can also be mounted on different axle carriers.

[0008] In an advantageous development of the invention, the first bracket and the second bracket each have at least two decoupling elements, which each have a bearing opening for a respective bearing bushing, wherein the first bracket and the third bracket can be arranged in a vibration-decoupled manner on the chassis of the motor vehicle, in particular on the axle frame, via their respective decoupling elements and the bearing bushings arranged in the decoupling elements.

[0009] In a particularly preferred embodiment of the fixing device according to the invention, at least one supporting bushing has an internal thread, wherein a clamping element is provided for fixing a pipeline (for example a hydraulic pipe or an electrical conductor) and can be fixed to the supporting bushing by being pressed into the internal thread. In this case, the clamping element has a C-shaped support / clamping part in a known manner, into which the pipeline to be fixed can be clipped later. In order to fix the clamping element on the first support, it can be pressed into the supporting bushing in a relatively simple manner, and the clamping element is then clipped / locked to the internal thread of the supporting bushing by means of correspondingly designed clipping / locking elements. The clamping element can achieve a long-term, reliable and extremely simple fixing of the pipeline in terms of installation friendliness. In addition, such fixing clips / clip elements can usually be manufactured as a one-piece injection molded part and are therefore not only cost-effective but also of high quality.

[0010] In another preferred embodiment of the fixing device according to the invention, a bearing pin, in particular a metal bearing pin, is arranged at one longitudinal end of the tube and is rotatably supported in a first mounting opening or in a centering device on the first support. Vibration decoupling can be achieved between the tube and the first mounting opening in the first support by means of the bearing pin, wherein, based on the bearing pin, axial compensation can also be achieved by means of the bearing pin and a corresponding bearing opening or a corresponding centering device in the first support.

[0011] Starting from the diameter of the tube, the support pin tapers towards the first support and maintains a constant diameter inside the first support. The first support is made in particular of plastic or rubber and is mounted in a recess in the axle carrier. The recess can be the same recess that is used to accommodate the support element of the roll stabilizer in a conventional chassis, that is to say in a non-active chassis.

[0012] Furthermore, the invention is based on the general idea of ​​providing a motor vehicle in which an electrohydraulic component is fastened to the chassis, in particular to the axle frame, by means of a fastening device as described in the preceding paragraph. This makes it possible to relatively easily mount an electrohydraulic component, such as a motor-pump unit, since, due to the pipe between the first and third brackets and due to the fact that the first and third brackets of the fastening device can be twisted relative to each other, the fastening device can also twist the electrohydraulic component during installation, thereby simplifying the installation process. Furthermore, due to the possible shortening of the pipe, the fastening device can be relatively easily adjusted to the specific structural conditions.

[0013] In another advantageous embodiment of the motor vehicle according to the invention, the second bracket and / or the third bracket are screwed in a fixed manner to the electro-hydraulic assembly, in particular to a corresponding cover of the electro-hydraulic assembly. In this way, the second bracket and the third bracket can be conveniently fixed to the corresponding cover of the electro-hydraulic assembly, wherein, although the second bracket and the third bracket are fixed to the electro-hydraulic assembly, the electro-hydraulic assembly can still be twisted relative to the first bracket due to the pipe located between the first bracket and the third bracket, thereby simplifying the installation.

[0014] In a further preferred embodiment of the motor vehicle according to the invention, the first and / or second bracket is arranged on the axle frame by means of bolts / threads which penetrate through their bearing bushings. The first and second brackets are thus connected to the axle frame in a fixed but vibration-decoupled manner, so that after the first and second brackets have been screwed to the axle frame, the first bracket can no longer be twisted relative to the second bracket or relative to the electrohydraulic assembly. The first bracket can only be twisted relative to the electrohydraulic assembly during the installation process, and adjustments may have to be made during this process to simplify the installation.

[0015] In a particularly preferred embodiment, the axle carrier has a first notch through which the tube passes, wherein the first bracket is arranged / threaded on the outside of the first notch. In addition or as an alternative, the axle carrier has a second notch, wherein the second bracket is arranged / threaded on the outside of the second notch in this case. The tube, the third bracket and the electrohydraulic component are arranged between the first notch and the second notch, which are respectively arranged on the brackets of the axle carrier, so that a particularly space-optimized arrangement of the electrohydraulic component can be achieved in the axle carrier region between the two brackets.

[0016] Further important features and advantages of the invention emerge from the dependent claims, the drawings and the associated description of the figures in conjunction with the drawings.

[0017] It should be understood that the above-mentioned features and the features to be explained below can be used not only in the respectively specified combination, but also in other combinations or alone, without departing from the scope of the invention as defined in the claims. The above-mentioned parts and the parts of the higher-level units (such as devices, equipment or arrangements) to be mentioned below (which are individually marked) can constitute individual components or parts of the unit, or integrated areas or sections of the unit, even if different from what is shown in the drawings.

[0018] Preferred exemplary embodiments of the invention are shown in the drawings and are explained in further detail in the following description, wherein the same reference numerals indicate identical, similar or functionally identical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings schematically show:

[0020] Figure 1 is a view of an electro-hydraulic assembly arranged on the fixing device of the present invention;

[0021] Figure 2 is a view of a third bracket of the fixing device of the present invention;

[0022] Figure 3is a view of an axle carrier of a motor vehicle according to the invention in the region of a first bracket of a fastening device according to the invention;

[0023] Figure 4 Yes Figure 3 A schematic diagram like that, but here showing the second bracket and the electro-hydraulic assembly area;

[0024] Figure 5 is an oblique view of the axle frame of the motor vehicle according to the present invention in the second bracket area;

[0025] Figure 6 Yes Figure 1 A schematic diagram of the same type, but shown here is another first bracket;

[0026] Figure 7 is a front view of a second bracket of the fixing device of the present invention;

[0027] Figure 8 Yes Figure 7 A similar diagram, but here with the lines secured to the second support by means of clip elements. DETAILED DESCRIPTION

[0028] according to Figure 1 and 6 The fixing device 1 for fixing an electrohydraulic component 2, in particular a motor-pump unit for an active hydraulic shock absorber, comprises a pipe 3 and at least one first bracket 4 (see Figure 1 , 3 and 6), the second bracket 5 (see Figure 1 , 4 to 7) and the third bracket 6 (see Figure 1 , 2 and 6). Figure 6 In addition, the first bracket 4 and the second bracket 5 are designed in the form of glasses and each have at least two decoupling elements 7, each with a bearing opening 8 for a bearing bushing 9, wherein the first bracket 4 and the third bracket 6 also each have a centering device or a first mounting opening 10 for rotatably mounting the pipe 3. By means of the fastening device 1 according to the invention, the electrohydraulic component 2 can be mounted on the axle frame 11 of the motor vehicle 12 according to the invention in a relatively simple manner (because it is rotatable in the first place).

[0029] In order to install the electrohydraulic assembly 2 on the axle frame 11 of the motor vehicle 12, the electrohydraulic assembly 2 is first connected to the fixing device 1 of the present invention. For this purpose, the second bracket 5 and the third bracket 6 are respectively screwed to the electrohydraulic assembly 2, in particular to the corresponding covers 13, 14 of the electrohydraulic assembly 2, in a fixed manner, that is, in a rotationally fixed manner.

[0030] In a particularly preferred embodiment, it is even possible to integrate the third bracket 6 into the corresponding cover 14, and / or to integrate the second bracket 5 into the corresponding cover 13. Here, it is even possible to design the corresponding covers 13, 14 and the relevant brackets 5, 6 as a whole, so that there is no need to install the second bracket 5 on the cover 13, and there is no need to install the third bracket 6 on the cover 14, thereby saving the corresponding installation costs and the necessary fasteners. It is also possible to further save installation space through such an integrated solution, because there is no need to design a screw-in opening for bolts in the corresponding covers 13, 14 for threading the relevant brackets 5, 6 to the corresponding covers 13, 14. Since the bolts are eliminated, the storage and logistics costs can also be reduced.

[0031] By inserting the tube 3 into the first mounting openings 10 or centering devices of the first bracket 4 and the third bracket 6, the first bracket 4 can be twisted relative to the electro-hydraulic assembly 2 and thus aligned in the desired mounting position. In this way, the twist angle of the first bracket 4 does not need to be aligned with the twist angle of the second bracket 5. In addition, by shortening the tube 3, the distance of the first bracket 4 relative to the third bracket 6 and, in turn, the distance relative to the electro-hydraulic assembly 2 can be adjusted and, for example, adapted to different axle frames 11.

[0032] observe Figure 1 and 2 It can be seen that the pipe 3 is directly supported in the corresponding complementary first mounting openings 10 of the first bracket 4 and the third bracket 6 .

[0033] The pipe 3 can be screwed to the third support 6 (pump cover) via tie rods / pull rods (located inside and therefore not visible). The third support 6 can be a hydraulic component with several functional surfaces and functional geometries. It forms the pressure chamber of the pump inwardly. The flange to be connected to the hydraulic line with threads for the corresponding fastening screws faces outward (see Figure 2 The threaded connection of the third bracket 6 relative to the first bracket 4 also requires a lot of space on the end face, so that only very little space remains on the end face of the electrohydraulic component 2 for installing various fastening geometries, such as the diameter of the pipe 3.

[0034] By virtue of the single thread for the tie rod, which is arranged coaxially in the centering device of the tube 3 (support tube), no further additional threaded connections are required. This brings about a very great advantage, since the electrohydraulic component 2 is preferably arranged in the installation space of a conventional stabilizer and replaces it. In this way, the entire fixing device 1 can form a stabilizer through the tube 3. However, since conventional stabilizers are much more slender than the electrohydraulic component 2, the installation space in the corresponding installation space is still insufficient in the radial direction compared to what is required for the electrohydraulic component 2. As a result, it is usually not possible to install a bracket in the circumferential direction of the electrohydraulic component 2. The invention solves this problem by utilizing the end face of the electrohydraulic component 2 for this purpose, although said end face also only provides very little space for fastening geometric structures.

[0035] Another advantage of the fastening device 1 according to the invention is that, by means of this particularly space-saving fastening concept, the electrohydraulic assembly 2 can be installed as an identical component or with only minor modifications in as many axles 11 as possible with different installation spaces, regardless of the series of construction. The omitted fastening geometries would require a correspondingly large number of individual solutions. This would make it impossible to achieve a modular design with as consistent a basic component as possible.

[0036] The tube according to the principle of the invention has a tie rod inside and a "glass-shaped structure" with an integrated decoupling element 7 screwed on the end, which can transmit torque in the torsional direction either by friction or also by form fit, such as knurling or other toothed structures on the end face of the tube 3. The torque in the torsional direction can be caused either externally by inertial forces, especially by horizontal or vertical impacts, or internally, especially by the starting torque of the electric motor.

[0037] And in Figure 6 In the embodiment shown, on the other hand, a bearing pin 21 is arranged at the longitudinal end of the tube 3, here at the longitudinal end facing the first support 4, which is rotatably supported in a centering device or first mounting opening 10. Starting from the diameter of the tube 3, the bearing pin 21 tapers in the direction of the first support 4 and maintains a constant diameter inside the first support 4. The first support 4 is made, in particular, of plastic or rubber and is mounted in a recess in the axle carrier 11. According to Figure 6 , the first support 4 does not have two decoupling elements 7, wherein according to Figure 6 This is also not necessary for the first support 4 which is designed in this way, since it can be fixedly screwed to the axle carrier 11 and ensures the vibration decoupling of the bearing pin 21 which can be made of metal in particular.

[0038] The pipe 3 is rotatably supported in the first support 4 by means of a support pin 21, and Figure 1 and 2 In the embodiment of the present invention, the distance can also be set between the first bracket 4 and the third bracket 6 by the support pin, and then between the first bracket 4 and the electro-hydraulic component 2. Here, the pipe 3 can be shortened on the opposite end in the longitudinal direction to set the distance.

[0039] observe Figure 7 It can be seen that at least one bearing bushing 9 has an internal thread 15. In addition, at least one clamping element 16 is provided for fixing a pipeline 17, in particular a hydraulic pipeline or an electrical line, which can be fixed to the bearing bushing 9 by pressing the clamping element into the internal thread 15. The respective clamping element 16 can have a C-shaped support in this case, into which the pipeline 17 (for example a hydraulic pipeline or an electrical line) can be clipped. The respective clamping element 16 has a corresponding snap-in element, which snaps into the internal thread 15 arranged there when the clamping element 16 is pressed into the bearing bushing 9, and then forms a snap-in connection between the clamping element 16 and the bearing bushing 9 of the respective decoupling element 7. Of course, it is also conceivable to design an external thread on the clamping element 16 that is complementary to the internal thread 15, and the clamping element 16 can be connected to the internal thread 15 via the external thread. Such a clamping element 16 also makes it possible to achieve a vibration-decoupled fixation of the line 17 fixed therewith relative to the second support 5 and thus relative to the electrohydraulic assembly 2 .

[0040] observe Figure 3 It can be seen that the axle frame 11 has a first notch 18, through which the pipe 3 passes, wherein the first bracket 4 is arranged on the outer side of the first notch 18. In addition, the axle frame 11 also has a second notch 19 (see Figure 4 ), wherein the second bracket 5 is arranged on the outside of the second notch 19. The second bracket 5 is fastened to the edge of the second notch 19 by corresponding bolts 20, and the first bracket 4 on the outside of the first notch 18 of the axle frame 11 is screwed to the edge of the first notch 18 in a similar manner by corresponding bolts 20, but not shown. The first notch 18 and the second notch 19 are arranged on the relevant brackets 22, 23 of the axle frame 11, in particular by screwing. By arranging the electro-hydraulic component 2 between the two brackets 22, 23 of the axle frame 11, a particularly space-optimized arrangement of the electro-hydraulic component 2 can be achieved.

[0041] The pipe 3 is rotatably supported in at least one first mounting opening 10 on the first support 4 or the third support 6, so that at least during mounting, the first support 4 can be twisted relative to the electrohydraulic component 2 and thus relative to the third support 6 and the second support 5. The electrohydraulic component 2 is screwed to the axle carrier 11 via the second support 5 in a torsionally fixed manner.

[0042] The fastening device 1 according to the invention and the motor vehicle 12 according to the invention provide not only a solution which optimizes the installation space for fastening the electrohydraulic assembly 2 on the motor vehicle 12 , but also a solution which is significantly simplified in terms of assembly.

Claims

1. A fixing device (1) for fixing an electro-hydraulic component (2), characterized in that: The fixing device (1) comprises a pipe (3) and at least one first bracket (4), a second bracket (5) and a third bracket (6), wherein the first bracket (4) and the third bracket (6) respectively have a centering device or a first mounting opening (10) for supporting the pipe (3) in a rotatable manner.

2. The fixing device according to claim 1, It is characterized in that The first support (4) and the second support (5) each have at least two decoupling elements (7), each of which has a bearing opening (8) for a respective bearing bushing (9).

3. The fixing device according to claim 2, It is characterized in that - the at least one bearing bushing (9) has an internal thread (15), A clamping element (16) is provided for fixing a line (17), in particular for fixing a hydraulic line or an electrical line, which can be fixed to the bearing bushing (9) by being pressed into the internal thread (15).

4. A fixing device according to any one of the preceding claims, It is characterized in that A bearing pin (21), in particular made of metal, is arranged at one longitudinal end of the tube (3) and is rotatably supported in the first mounting opening (10) of the first support (4) made of plastic or rubber.

5. Motor vehicle (12) having an electrohydraulic assembly (2) which is fastened to an axle carrier (11) by means of a fastening device (1) as claimed in any one of the preceding claims.

6. The motor vehicle according to claim 5, It is characterized in that The second bracket (5) and / or the third bracket (6) are fixedly threadedly connected to the electric hydraulic component (2).

7. A motor vehicle according to claim 5 or 6, It is characterized in that The first bracket (4) and / or the second bracket (5) are arranged on the axle frame (11) via bolts (20) passing through the bearing bushing (9).

8. A motor vehicle according to any one of claims 5 to 7, It is characterized in that The electrohydraulic assembly (2) is designed as a motor-pump unit for an active hydraulic shock absorber.

9. A motor vehicle according to any one of claims 5 to 8, It is characterized in that The axle carrier (11) has a first opening (18), through which the pipe (3) is guided to the first bracket (4), wherein the first bracket (4) is arranged on the outer side of the first opening (18).

10. A motor vehicle according to any one of claims 5 to 9, It is characterized in that The axle frame (11) has a second notch (19), wherein the second bracket (5) is arranged on the outer side of the second notch (19).

Images