Housing arrangement, braking force generator

Abstract

The invention relates to a housing arrangement (1), comprising a first housing (2), wherein the first housing (2) has a first recess (7) and a first sealing surface (8) which surrounds the first recess (7). According to the invention, an elongate sealing projection (15), in particular a sealing bead, projecting from the first sealing surface (8) is arranged on an edge region (14) of the first sealing surface (8), said edge region being at a distance from the first recess (7), in order to hold back a sealing means (12), in particular a silicone-based sealing means, which can be arranged / is arranged on the first sealing surface (8).

Description

[0001] R.409832

[0002] - 1 -

[0003] Description

[0004] title

[0005] Housing arrangement, brake force generator

[0006] The invention relates to a housing arrangement comprising a first housing, wherein the first housing has a first recess and a first sealing surface surrounding the first recess.

[0007] Furthermore, the invention relates to a brake force generator of a braking system of a motor vehicle.

[0008] State of the art

[0009] Housing arrangements of the type mentioned above are known from the prior art, for example in brake force generators, where two housings, for example of an electric machine and a gear arrangement as part of an actuator arrangement, must be sealed together.

[0010] In the field of actuators, a common method is to bond the housing containing the electric motor to the housing of the gearbox assembly using a wet sealant. The wet sealant, for example silicone, has the advantage that the area between the two housings is filled by compressing the silicone bead, with the silicone conforming to the shape of the housings. Due to tolerances in the housings and the amount of silicone applied, the resulting actual sealing contour varies, and consequently, so does the amount of excess silicone. The amount of silicone is usually calculated so that the minimum requirement is met in every case. Conversely, this means that in the other extreme case, silicone will ooze out over the two housings and harden there. R.409832

[0011] - 2 -

[0012] Provided that no damage occurs to the surrounding area, this is not a problem. However, if another component is located in the immediate vicinity, the oozing silicone can cause issues. If the silicone were to ooze out beyond the sealing surface, it could run into a mounting area of ​​the housing, such as a splash guard interface plate. Because the installation of these plates typically occurs with a certain delay, there is a risk that the silicone will have already partially cured. In this case, the oozing silicone seam would impair proper installation.

[0013] Disclosure of the invention

[0014] The housing arrangement according to the invention, comprising the features of claim 1, is characterized in that an elongated sealing projection, in particular a sealing bead, is arranged at an edge region of the first sealing surface, spaced away from the first recess, to retain a sealant, in particular a silicone-based sealant, which can be arranged / is arranged on the first sealing surface. This advantageously prevents the sealant from leaving the sealing surface, in particular from reaching a surface adjacent to the sealing surface, which could be easily damaged as a result, especially if the first housing is placed with this surface on a floor, for example during transport, or which, as mentioned at the outset, makes correct assembly of the housing to another component at least more difficult.By providing the corresponding elongated sealing projection, the sealing point is advantageously designed in such a way that the adjacent component remains unaffected and all components can be assembled independently of one another. The sealing projection redirects the sealant, particularly at right angles to the sealing surface, so that it remains on the sealing surface, or at least on the sealing projection, as a bead of sealant, preventing it from wetting the corresponding area for attaching the other component. In this respect, the sealing projection creates an advantageous barrier for the sealant. As a positive side effect, the additional barrier improves the sealing function, because the additional sealing seam created by the redirected sealant advantageously minimizes the load at the actual sealing point. As already mentioned at the beginning, this is used in the R.409832.

[0015] - 3 - the aforementioned brake force generator offers a particularly advantageous application possibility; however, the housing arrangement according to the invention is of course not limited to this, and the invention can be used in any type of housing arrangement where sealing medium is to be prevented from leaving a sealing surface.

[0016] According to a preferred embodiment of the invention, the first housing has a side surface adjacent to the first sealing surface, in particular arranged perpendicular to it, for attaching the housing assembly to an element, in particular a housing element or wall element, and the first recess and / or the first sealing surface is / are separated from the side surface by the sealing projection. The sealing projection thus advantageously prevents the sealant from reaching the side surface, as described above.

[0017] It is particularly preferred that the housing arrangement comprises a second housing which, in particular at a housing flange, has a second recess and a second sealing surface surrounding the second recess, and that the first housing with its first sealing surface is connectable / connected to the second sealing surface of the second housing by means of the sealant, in particular by flanges and / or screws. Such a connection of the two housings at the sealing surface, in conjunction with the sealing projection, offers the advantage that the sealant does not run off the sealing surface, thus maximizing the sealing effect between the two housings.

[0018] According to a preferred embodiment of the invention, a gear assembly is arranged in the first housing and / or an electric machine is arranged in the second housing. With such an arrangement of the gear assembly and / or machine in the housings, the advantages of the housing arrangement according to the invention are particularly pronounced.

[0019] It is particularly preferred that the sealing projection is at least partially higher than a housing flange of a second housing that can be connected to / connected to the first housing at the first sealing surface, so that the R.409832

[0020] - 4 -

[0021] The sealing protrusion extends further from the first sealing surface than the housing flange. This has the advantage that the sealing protrusion reliably retains the sealant. In particular, the sealing protrusion is designed to be higher than the housing flange, at least in the area where, after assembly, the housing flange has its smallest distance to the sealing protrusion on the sealing surface.

[0022] According to a preferred embodiment of the invention, the sealing projection extends at least partially along an outer edge of the first housing part. By extending the sealing projection in this way, the outer edge itself advantageously forms part of the sealing projection, so that the sealing surface is reliably separated from an adjacent side surface.

[0023] It is particularly preferred that the sealing projection is formed integrally with the first housing part or connected to it. Due to the integral form, the sealing projection is advantageously an integral component of the housing part, so that no sealant can penetrate between the sealing projection and the housing part. By connecting the sealing projection to the housing part, it is advantageously manufactured and handled separately and can, in particular, be connected to the housing part only as needed. For example, it is connected to the housing part by a material bond, a force-fit, and / or a form-fit, in particular by bonding or welding.

[0024] According to a preferred embodiment of the invention, the sealing projection is formed only in a predetermined portion of the edge region, depending on a dimension of the first sealing surface and / or the amount of sealant expected to be retained on the first sealing surface. Such a design of the sealing projection advantageously ensures that it is particularly material-efficient. In an area where the sealing surface is already sufficiently large and / or where no sealant is expected to run off the sealing surface, the sealing projection can therefore be advantageously omitted. R.409832

[0025] - 5 -

[0026] It is particularly preferred that the sealing projection, in its geometry, especially its height and / or length, is adapted to the amount of sealant expected to be retained on the first sealing surface. Such adaptation of the sealing projection's geometry offers the advantage that the projection is not only designed to save material but also maximizes its retention effect.

[0027] According to a preferred embodiment of the invention, the sealing projection has a curvature or chamfer at an edge or side surface. Such a curvature or chamfer advantageously ensures that the sealant is pushed back onto the sealing surface. The curvature or chamfer extends transversely to the sealing projection in the direction of the sealing surface and is preferably formed completely along the longitudinal extent of the sealing projection.

[0028] It is particularly preferred that the sealing projection has a curvature along its longitudinal extent, especially in its height. The sealing projection is thus curved along its longitudinal extent, particularly convex. Such a curvature offers the advantage that the sealing projection's retention capacity for sealant is adapted to the expected amount of sealant depending on its height. For example, the sealing projection has a symmetrically convex shape overall, such that it reaches its greatest height, or projects furthest from the sealing surface, approximately at its midpoint along its longitudinal extent.

[0029] The brake force generator of a motor vehicle braking system with the features of claim 12 comprises a gear assembly and an electric machine. It is characterized by the housing arrangement according to the invention, wherein the gear assembly is / are arranged in the first housing and / or the electric machine is / are arranged in a second housing sealed to the first housing. This results in the advantages already mentioned. R.409832

[0030] - 6 -

[0031] Further preferred features and combinations of features will become apparent from the foregoing and from the claims. The invention will now be explained in more detail with reference to the drawings. These drawings show...

[0032] Figure 1 shows a first embodiment of an advantageous housing arrangement,

[0033] Figure 2 shows a second embodiment of the housing arrangement, and

[0034] Figure 3 shows a third embodiment of the housing arrangement.

[0035] Figures 1 to 3 each show an advantageous housing arrangement 1 in a detailed view, with Figure 1 showing a first embodiment, Figure 2 a second embodiment, and Figure 3 a third embodiment of the housing arrangement 1. Because the components of the housing arrangement 1 are identical in each case, the same reference numerals are used and the embodiments are described together. Relevant differences are discussed accordingly.

[0036] The housing arrangement 1 comprises a first housing 2 and a second housing 3. The housing arrangement 1 is, in particular, a component of a brake force generator 4 of a braking system of a motor vehicle, which is not shown in further detail.

[0037] The housing assembly 1, and thus the brake force generator 4, comprises an electric machine 5 and a gear assembly 6. The gear assembly 6 is arranged in the first housing 2 and the electric machine 5 in the second housing 3, as can be seen in the embodiment shown in Figure 1.

[0038] The first housing 2 has a first recess 7 and a first sealing surface 8 surrounding the first recess 7. The second housing 3 has a second recess 10 in a housing flange 9 and a second sealing surface 11 surrounding the second recess 10. R.409832

[0039] - 7 -

[0040] The first housing 2 is connected to the second sealing surface 11 of the second housing 3 by means of a sealing agent 12 shown in figure 2, in particular silicone-based, and is flanged and screwed on by means of screws 13.

[0041] At an edge area 14 of the first sealing surface 8 spaced apart from the first recess 7, an elongated sealing projection 15, in particular a sealing bead, is arranged to retain the sealing medium 12 which can be arranged on the first sealing surface 8 or between the sealing surfaces 8, 11, projecting vertically from the first sealing surface 8.

[0042] The first housing 2 has a side surface 16 adjacent to the first sealing surface 8, arranged perpendicular to it, for attaching the housing arrangement 1 to an element 17 shown in Figures 2 and 3, in particular a housing element or wall element.

[0043] The first recess 7 and the first sealing surface 8 are separated from the side surface 16 by the sealing projection 15. The sealing projection 15 prevents sealant 12 from reaching the side surface 16.

[0044] The sealing projection 15 extends completely along an outer edge 18 of the first housing part 2 and is formed integrally with the first housing part 2 or integrally molded onto the housing part 2. According to further embodiments not shown, the sealing projection 15 is only connected to the first housing part 2.

[0045] As can be seen at least in the embodiment shown in Figure 1, the sealing projection 15 can only be formed in a predetermined portion of the edge region 14, depending on a dimension of the first sealing surface 8 and / or the amount of sealant 12 expected to be retained on the first sealing surface 8. Thus, in Figure 1, it extends only over a portion of the outer edge 18, or only over a portion of the length of the first housing 2, in order to save material. R.409832

[0046] - 8 -

[0047] The sealing projection 15 is preferably adapted in its geometry, in particular its height and / or length, to the amount of sealant 12 expected to be retained on the first sealing surface 8.

[0048] In the embodiment shown in Figure 1, the sealing projection 15 has a curvature in height along its longitudinal extent, so that it is convex overall.

[0049] The height of the sealing projection 15 is designed such that the maximum height is located precisely where the greatest excess of sealant is expected. In the other areas, the height of the sealing projection 15 is also reduced to the required minimum.

[0050] In this case, the sealing projection 15 is, in particular, at least in some areas higher than the housing flange 9 of the second housing 3, so that the sealing projection 15 protrudes further from the first sealing surface 8 than the housing flange 9.

[0051] In the embodiment shown in Figure 2, the sealing projection 15 has a chamfer on one edge 19 facing the sealing surface 8. In particular, the corresponding side surface 20 is inclined or curved overall. This embodiment can, of course, be combined with the embodiment shown in Figure 1.

[0052] In the embodiment shown in Figure 3, the sealing projection 15 has a greatly simplified geometry. In particular, it is formed along the entire outer edge 18, thus extending over the entire length of the first housing 2, and has a consistently cuboid shape overall, meaning it has neither varying heights, curvatures, nor chamfers. This makes it particularly easy to manufacture.

Claims

R.409832 - 9 - Claims 1. Housing arrangement (1), comprising a first housing (2), wherein the first housing (2) has a first recess (7) and a first sealing surface (8) surrounding the first recess (7), characterized in that an elongated sealing projection (15), in particular a sealing bead, is arranged on an edge region (14) of the first sealing surface (8) spaced apart from the first recess (7) for retaining a sealant (12), in particular a silicone-based sealant (12), which can be arranged / is arranged on the first sealing surface (8).

2. Housing arrangement according to claim 1, characterized in that the first housing (2) has a side surface (16) adjacent to the first sealing surface (8), in particular arranged perpendicular to it, for attaching the housing arrangement (1) to an element (17), in particular a housing element or wall element, and that the first recess (7) and / or the first sealing surface (8) is / are separated from the side surface (16) by the sealing projection (15).

3. Housing arrangement according to one of the preceding claims, characterized in that the housing arrangement (1) has a second housing (3) which, in particular on a housing flange (9), has a second recess (10) and a second sealing surface (11) surrounding the second recess (10), and that the first housing (2) with the first sealing surface (8) is sealably connectable / connected to the second sealing surface (11) of the second housing (3) by the sealing means (12), in particular flanged and / or screwed on.

4. Housing arrangement according to one of the preceding claims, characterized in that a gear arrangement is provided in the first housing (2). R.409832 - 10 - (6) and / or an electric machine (5) is / are arranged in the second housing (3).

5. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) is at least partially higher than a housing flange (9) of a second housing (3) which can be connected / connected to the first housing (2) at the first sealing surface (8), so that the sealing projection (15) projects further from the first sealing surface (8) than the housing flange (9).

6. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) extends at least partially along an outer edge (18) of the first housing part (2).

7. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) is formed integrally with the first housing part (2) or is connected with the first housing part (2).

8. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) is formed only in a predetermined part of the edge region (14) depending on a dimension of the first sealing surface (8) and / or an amount of sealant to be retained on the first sealing surface (8).

9. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) is adapted in its geometry, in particular its height and / or length, to a quantity of sealant (12) to be retained on the first sealing surface (8).

10. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) has a curvature or chamfer on an edge (19) or side surface (20). R.409832 - 11 - 11. Housing arrangement according to one of the preceding claims, characterized in that the sealing projection (15) has a curvature along its longitudinal extent, in particular in its height.

12. Brake force generator (4) of a braking system of a motor vehicle, comprising a Gear arrangement (6), and with an electric machine (5), characterized by a housing arrangement (1) according to one of the preceding claims, wherein the gear arrangement (6) is / are arranged in the first housing (2) and / or the electric machine (5) is / are arranged in a second housing (3) which is sealed to the first housing (2).

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