Device of a motor vehicle

Abstract

The invention relates to a device (1) of a motor vehicle comprising two components (2, 3) to be positively connected to one another at a contact surface (9), wherein at least in a partial area of ​​the contact surface (9) a flat gasket (6) having a specific sealing surface (14) is arranged. The invention provides that in the area of ​​the sealing surface (14) of the flat gasket (6) a moisture-collecting recess (15) is provided in the surface of one of the two components (3).

Description

[0001] The invention relates to a device of a motor vehicle according to the preamble of claim 1, in particular a braking device of a motor vehicle.

[0002] To protect certain components of a motor vehicle, designed as assemblies with multiple parts, from external influences, and in particular to protect against moisture ingress into the interior of the respective housing, sealing elements are used at vulnerable points. Such sealing elements, for example O-rings or flat gaskets, are also used in the braking system of a motor vehicle, thereby protecting the electronic components of the electromechanical assembly of the braking system.Under unfavorable conditions, such as during winter operation of the vehicle or during specific functional tests like a salt spray test, moisture can accumulate on these sealing elements. This moisture can then undermine the sealing element, particularly if a crust forms in the presence of salt water, and ultimately penetrate the interior of the device housing or specific areas of the device, causing corrosion. This corrosive penetration by moisture can damage the electronic components of the device or impair its functionality, which in turn can affect the functionality of the electronic components and ultimately the functionality of the entire device.

[0003] The invention is based on the objective of providing a device for a motor vehicle according to the preamble of claim 1, in which, when sealing two components to be joined together, protection against moisture ingress is enabled in a simple and reliable manner.

[0004] This problem is solved in a device of a motor vehicle with the features of claim 1.

[0005] Advantageous further developments of the invention are part of the additional patent claims.

[0006] In the inventive device of a motor vehicle with a flat gasket having a specific sealing surface, which is arranged between two components of the device to be positively connected to one another, a moisture-collecting depression is provided in the surface of one of the two components in the area of ​​the sealing surface of the flat gasket. The moisture-collecting depression is thus provided within the sealing surface of the flat gasket and therefore within the contact surface between the two components of the device in the surface of one of the two components.

[0007] The moisture-collecting recess is positioned at a distance from the edge of the sealing surface of the flat gasket to ensure a flat covering of the contact surface between the two components and thus the flattest possible sealing surface of the flat gasket. Similarly, the moisture-collecting recess integrated into the surface of one of the two components of the device is positioned at a distance from any through-openings that may be provided in the flat gasket to ensure sufficient stability of the device.

[0008] The moisture-collecting depression can be incorporated into the surface of the respective component of the device during its manufacture, or it can be added subsequently through a corresponding machining step. The moisture-collecting depression can have a predetermined shape, which can be selected depending on the machining method used on the surface of the respective component or the manufacturing method of the respective component. For example, the moisture-collecting depression can be milled into the surface of the respective component of the device.

[0009] In a first preferred embodiment of the invention, the moisture-collecting depression is designed as a circumferential circular groove that is incorporated into the surface of one of the two components of the device.

[0010] In an alternative preferred embodiment of the invention, the moisture-collecting depression is designed as a circumferential, approximately circular groove with a flattening on one side adapted to the design of the component of the device intended for creating the depression.

[0011] In a further alternative preferred embodiment of the invention, the moisture-collecting recess is designed as a C-shaped groove that is formed in the surface of one of the two components of the device. That is, in this embodiment of the invention, the groove is not completely closed, but has an interruption with a specific angular dimension between the two groove ends.

[0012] Preferably, the edge area of ​​the moisture-collecting depression can also be tangentially flattened.

[0013] The flat gasket can also have at least one through-opening into which a corresponding projection formed on one of the two components to be joined engages. The diameter of the respective through-opening is chosen to be smaller than the diameter or width of the corresponding projection on the respective component. This ensures precise fixation of the two components to be joined, thereby improving the connection of the flat gasket to the two components and enabling a secure, captive installation of the flat gasket.

[0014] In an advantageous embodiment of the invention, a collection chamber, connected to the moisture-collecting recess, is incorporated into the surface of one of the two components. In particular, the collection chamber is directly adjacent to the moisture-collecting recess and can thus directly absorb the moisture accumulating in the recess. This is especially straightforward when the collection chamber is located at the lowest point of the two components to be joined in the device's installed position. Moisture accumulates at this lowest point, having potentially seeped under the edge of the sealing surface of the flat gasket due to capillary action, and is then absorbed by the collection chamber.

[0015] In a further advantageous embodiment of the invention, a drainage channel is provided which is connected to the moisture-collecting depression or to the collection chamber. Through this drainage channel, the moisture accumulated in the moisture-collecting depression or in the collection chamber is then discharged to a suitable location in the motor vehicle, for example, into the engine compartment of the motor vehicle.

[0016] The generic device of a motor vehicle is preferably designed as a braking device. In this braking device, a cavity is formed at the connection of the two components to accommodate an axially displaceable piston. A flat gasket, having a specific sealing surface, is arranged at least in a partial area of ​​the respective connecting surface of the two components and seals them axially against each other.

[0017] The shape and size of the sealing surface of the flat gasket can also be selected to suit the characteristics of the two components of the brake assembly to be joined. In particular, the sealing surface of the flat gasket can be designed according to the size and shape of the contact surface of one of the two components to be joined. Alternatively, the sealing surface of the flat gasket can also have a predetermined geometric shape, for example, a rectangular, square, round, or elliptical shape.

[0018] Advantageously, in the generic device of a motor vehicle, the described sealing according to the invention provides simple and cost-effective protection of the device components against corrosive undercutting. In particular, a cavity formed at the connection of the two components, which is designed as a piston chamber or piston bore for receiving an axially displaceable piston of a motor vehicle brake device, can also be protected against such corrosive undercutting and thus against unwanted moisture or fluid ingress.

[0019] Furthermore, the recess incorporated into the surface of one of the two components of the device to be joined advantageously interrupts the capillary action for any moisture that may nevertheless penetrate from the edge of the sealing surface, thus largely preventing undesirable undercutting of the sealing surface of the flat gasket due to capillary action. This allows for even better protection of the device components against unwanted moisture or liquid ingress.

[0020] Furthermore, the invention also includes combinations of the features of the described embodiments.

[0021] An embodiment of the invention is described in more detail below with reference to the drawing. The drawing shows: Fig. 1 in a sectional view a section of a braking device of a motor vehicle with two components to be joined together. Fig. 2 a detailed view of a component of the brake device in a top view and a side view in a first embodiment. Fig. 3 A detailed view of a component of the brake device in a top view in an alternative embodiment. Fig. 4 a detailed view of a component of the brake device in a top view in a further alternative embodiment.

[0022] The embodiments described below are preferred embodiments of the invention. In these embodiments, the described components each represent individual features of the invention that can be considered independently of one another. Each of these features further develops the invention independently and can therefore be considered part of the invention individually or in a combination other than that shown. Furthermore, the described embodiments can also be supplemented by other features of the invention already described.

[0023] In the Fig. Figure 1 is a schematic representation of a section of the device 1 designed as a braking device for a motor vehicle. In the sectional drawing of the Fig. Figure 1 shows that in such a braking device 1 of a motor vehicle, a cavity is formed by joining a first component 2 and a second component 3 to create a piston chamber 4 or pressure chamber for receiving an axially displaceable, pedal-actuated piston 5. The first component 2, as the front part of the piston chamber 4, is, for example, designed as an aluminum block and functions as the pressure chamber side when the piston 5 is actuated, whereby the piston 5 acts on a hydraulic pressure chamber filled with brake fluid to generate brake pressure. The second component 3, as the rear part of the piston chamber 4, is, for example, designed as a die-cast part and functions as the actuating side when the piston 5 is actuated.

[0024] In the form-fit connection and assembly of the two components 2, 3, projections 10 formed on the second component 3 engage as fastening bolts in corresponding receptacles on the first component 2. Furthermore, a large-area sealing element designed as a flat gasket 6 with a defined sealing surface is provided between the two components 2, 3. The flat gasket 6 is arranged between a connecting surface 7 formed on the first component 2 and a connecting surface 8 formed on the second component 3, thus forming at least part of the contact surface 9 of the two components 2, 3. Through-openings 11 are provided in the flat gasket 6 corresponding to the projections 10 formed as fastening bolts on the second component 3. A through-opening 12 is also provided in the flat gasket 6 corresponding to the piston chamber 4.Here, the diameter of the through-openings 11 is specified as slightly smaller than the width of the projections 10 designed as fastening bolts, and the diameter of the through-opening 12 is specified as slightly smaller than the diameter of the piston chamber 4. This ensures a flush and captive connection of the flat gasket 6 to the two components 2 and 3. The large-area flat gasket 6, with its large sealing surface, achieves a reliable seal between the two components 2 and 3 in the axial direction at their contact surface 9, thereby protecting the piston chamber 4 from the ingress of unwanted moisture due to corrosive undercutting.

[0025] In the Fig. Figure 2 shows a detailed view of the second component 3 of the brake device 1 of the motor vehicle, including the flat gasket 6, in a top and a side view. In addition to the through-openings 11 provided in the flat gasket 6 for receiving the projections 10 on the second component 3, which serve as fastening bolts, and the through-opening 12 for receiving the piston chamber 4, the entire surface of the flat gasket 6 is designed as an adhesive surface 13. The adhesive surface 13 ensures a flush and secure connection of the flat gasket 6 to the two components 2 and 3. Furthermore, a moisture-collecting recess 15, in the form of an annular groove, is formed in the surface of the second component 3 in the area of ​​the sealing surface 14 of the flat gasket 6, for example, by milling the surface of the second component 3.In this moisture-collecting recess 15, which is an annular groove, any moisture that may penetrate the sealing surface 14 due to capillary action is collected. Depending on the depth of the moisture-collecting recess 15, a certain volume of fluid can be absorbed, thus reliably protecting the interior of the brake device 1, and in particular the piston chamber 4, from the ingress of unwanted moisture or fluid due to capillary action under the sealing surface 14 of the flat gasket 6. Furthermore, the edge region 21 of this moisture-collecting recess 15 can also be tangentially flattened.

[0026] In the Fig. Figure 3 shows an alternative embodiment of the second component 3 with the flat gasket 6 and the moisture-collecting recess 15 incorporated into the surface of the second component 3 in the area of ​​the sealing surface 14 of the flat gasket 6. This approximately annular groove, which is already incorporated during the manufacture of the second component 3, has a flattened side or flattening 24 in the area of ​​the contact edge 20. This means that the groove of the moisture-collecting recess 15 is completely closed, but is partially parallel to the contact edge 20 of the second component 3. This also results in improved, uniform contact of the flat gasket 6 with the second component 3, which in turn improves the sealing effect of the flat gasket 6. Furthermore, the edge region 21 of this moisture-collecting recess 15 can also be tangentially flattened.

[0027] Furthermore, this annular groove with a flattened section 24, serving as a moisture-collecting depression 15, has a collection chamber 16, or the annular groove with a flattened section 24, serving as a moisture-collecting depression 15, is connected to this collection chamber 16. Any moisture that may penetrate the edge region 19 of the sealing surface 14 due to capillary action collects as liquid 22 in the annular groove with a flattened section 24, serving as a moisture-collecting depression 15. If the collection chamber 16 is located in a suitable position, with suitable dimensions, and in particular with a suitable depth in the surface of the second component 3, at least a large proportion of the moisture that may penetrate the edge region 19 of the sealing surface 14 by capillary action will be collected as liquid 22 in this collection chamber 16.

[0028] As shown in the detailed description of the Fig. As can be seen in Figure 3, the collection chamber 16 is located, in particular, at the lowest point 23 of component 3 in the installation position of the two joined components 2, 3 within the brake device 1. Since a large volume of fluid 22 can be absorbed here by the collection chamber 16 and by the annular groove with flattening 24 as a moisture-collecting depression 15, the interior of the brake device 1 and, in particular, also the piston chamber 4 of the brake device 1 are reliably protected from the ingress of unwanted moisture or fluid 22 as a result of capillary action under the sealing surface 14 of the flat gasket 6.

[0029] In the Fig.Figure 4 shows a further alternative embodiment of the second component 3 with the flat gasket 6 and the moisture-collecting recess 15, formed as a C-shaped groove in the area of ​​the sealing surface 14 of the flat gasket 6, which is incorporated into the surface of the second component 3. This C-shaped groove, which is already incorporated into the second component 3 during its manufacture, thus has an interruption 18 in the area of ​​the contact edge 20, meaning that the C-shaped groove is not completely closed.

[0030] Furthermore, the C-shaped groove, acting as a moisture-collecting recess 15, is connected to a drainage channel 17. Any moisture that may penetrate the edge region 19 of the sealing surface 14, possibly below the sealing surface 14 of the flat gasket 6, as a result of capillary action, collects as liquid 22 in the moisture-collecting recess 15, which is designed as a C-shaped groove, and is then drained away, for example, into the engine compartment of the vehicle via the drainage channel 17. This reliably protects the interior of the brake device 1, and in particular the piston chamber 4 of the brake device 1, from the ingress of unwanted moisture or liquid 22 resulting from capillary action under the sealing surface 14 of the flat gasket 6. The edge region 21 of this moisture-collecting recess 15 can also be tangentially flattened.

[0031] Overall, the examples thus demonstrate how a device according to the invention for a motor vehicle, and in particular a braking device according to the invention for a motor vehicle, can be provided with advantageous properties, especially with regard to reliable sealing and reliable protection against impairment due to capillary penetration of the sealing surface of the flat gasket. Reference symbol list 1 Device / Brake Device 2 first component 3 second component 4 piston chamber 5 pistons 6 Flat gasket 7 Connecting surface 8 Connecting surface 9 Contact area 10. Shape as a fastening bolt 11 Through opening in flat gasket 12 Through opening in flat gasket 13 Adhesive surface 14 sealing surface 15 Recess / groove below flat gasket 16 Collection chamber 17 Drainage channel 18 Interruption area groove 19 Edge area sealing surface 20 attachment edge 21 Edge area indentation 22 Liquid 23 lowest point 24 Flattening

Claims

[1] Device (1) of a motor vehicle, comprising two components (2, 3) to be positively connected to each other at a contact surface (9), wherein at least in a partial area of ​​the contact surface (9) a flat gasket (6) having a specific sealing surface (14) is arranged, characterized by , that in the area of ​​the sealing surface (14) of the flat gasket (6) a moisture-collecting depression (15) is incorporated into the surface of one of the two components (3). [2] Device (1) according to claim 1, characterized by , that the moisture-collecting depression (15) is created by milling into the surface of one of the two components (3). [3] Device (1) according to claim 1 or 2, characterized by , that the moisture-collecting depression (15) is provided as a circumferential circular groove in the surface of one of the two components (3). [4] Device (1) according to claim 1 or 2, characterized by, that the moisture-collecting depression (15) is provided as a C-shaped groove in the surface of one of the two components (3). [5] Device (1) according to any one of claims 1 to 4, characterized by , that the edge region (21) of the moisture-collecting depression (15) is tangentially flattened. [6] Device (1) according to any one of claims 1 to 5, characterized by , that a collection chamber (16) connected to the moisture-collecting depression (15) is incorporated into the surface of one of the two components (3). [7] Device (1) according to any one of claims 1 to 6, characterized by , that the moisture-collecting depression (15) or the collection chamber (16) connected to the moisture-collecting depression (15) is connected to a drainage channel (17). [8] Device (1) according to claim 6 or 7, characterized by, that the collection chamber (16) is arranged at the lowest point (23) of the two components (2, 3) to be connected in the installation position of the device (1). [9] Device (1) according to one of claims 1 to 8, comprising two components (2, 3) to be connected to each other as a braking device of a motor vehicle. [10] Brake device (1) according to claim 9, characterized by , that when the two components (2, 3) are joined, a cavity is formed as a piston chamber (4) to accommodate an axially displaceable piston (5).

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