Method and device for sealing device

Abstract

The invention relates to a method for sealing a device, in which an externally circumferential flange (12) of a component (10) of the device is completely submerged into a fluid sealing material (17) such that the sealing material adheres to the flange (12), and in which the device is subsequently assembled, in this way, a first surface (16) of the flange (12) is connected to the first housing assembly (21), and a second surface (11) of the flange (12) opposite the first surface (16) thereof is connected to the second housing assembly (22).

Description

Technical Field

[0001] The invention relates to a method for sealing a device and a device. Background Art

[0002] DE 102016205164 A1 discloses an electric motor having a left-hand and a right-hand bearing shield mounted on a stator. The two bearing shields are clamped against the stator by means of clamping screws. A damping ring is arranged between the bearing shield and the stator. Summary of the invention

[0003] In contrast, the method for sealing a device according to the invention, which has the features of the independent claim, has the advantage that the seal can be arranged between the components of the device and between the first and second housing components of the device in a simple manner in one working step. For this purpose, the flange to be arranged on the component is immersed in the sealing material of the fluid so that the opposite sides of the flange are wetted with the sealing material. As a result, in one of the working steps, not only a seal is produced relative to the first housing component arranged on the first side of the flange, but also a seal is produced relative to the second housing component arranged on the opposite second side of the flange. As a result, it is possible to avoid arranging separate seals on the opposite sides of the flange. Rotation of the components for arranging the seal is not required during the production process. In general, the joining process of the components can be simplified and the cycle time in production can be reduced.

[0004] The position of the seal is locally defined by the design of the sealing flange, since the component is ideally immersed in the liquid sealing material in such a way that the flange is just wetted with the sealing material on both sides. As a result, separate work steps for inserting the previously produced sealing ring and for distributing the sealing strip to the material of the component are no longer necessary. In particular, the dimensionally stable application of the sealing strip or the positioning of the sealing ring is not necessary. In this case, the desired thickness of the seal can be easily set by a suitable choice of the viscosity of the liquid sealing material.

[0005] In addition, a free-form seal can be produced, thereby enabling a wider design margin for the shaping of the component and thus of the flange, since no standardized seal shapes and seal sizes need to be used. Likewise, complex adjustment of the distributor device for applying the sealing strip can be dispensed with.

[0006] Further advantages are derived from the dependent claims. It is therefore advantageous if the assembly of the component to the housing component is already carried out when the sealing material has not yet completely hardened. This makes it possible to additionally achieve an adhesive connection between the component and the housing component by hardening only after assembly and thereby also producing an adhesive connection between the sealing material and the housing component.

[0007] In an alternative embodiment, the sealing material can also be hardened first, since after hardening the component can be moved reliably and can be introduced reliably into the design of the device, for example, without the risk of the sealing material remaining adhered at other locations or dripping off the flange.

[0008] Furthermore, it is advantageous if, during assembly of the component, pressure is exerted on the sealing material applied to the flange in order to be able to achieve a sealed connection between the component and the housing component.

[0009] Furthermore, it is advantageous to provide, in addition to the optional adhesive connection of the housing components and the component, fixing means such as screws or latching connections in order to additionally produce a mechanical connection between the housing components and / or between the housing components and the component.

[0010] It is also advantageous to use a liquid having at least one cross-linked plastic as the sealing material, since such plastic compounds are long-term stable and have good sealing properties. Here, room temperature cross-linking silicones or anaerobic cross-linking acrylates have proven to be particularly advantageous.

[0011] Corresponding advantages result for a device produced according to the method according to the invention. It is particularly advantageous if the component is designed as a stator of an electric motor, which is to be installed in a housing that protects it from external influences. In this case, sealing on both sides is necessary, which can be achieved with the method according to the invention. In this case, the flange is advantageously arranged on the upper side of the stator housing or on the lower side of the stator housing, so that an arrangement that saves as much space as possible can be achieved and the sealing material cannot enter the stator even when it sinks into the liquid sealing material, but only remains on the flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Exemplary embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description.

[0013] Figures 1 to 3 The method flow of sinking the component into the sealing material is shown;

[0014] Figure 4 An exploded view of a device having two housing assemblies and one assembly is shown;

[0015] Figure 5 An embodiment for an assembled device is shown;

[0016] Figure 6 Details of the connection between the housing assembly and the assembly are shown along with the applied sealing material. DETAILED DESCRIPTION

[0017] The method according to the present invention can be used for any device, for which the external space should be sealed relative to the internal space. This method is particularly advantageous for electrical or electronic devices, for which the electrical or electronic circuits located inside the device should be protected from environmental influences such as moisture. In particular, it is necessary in vehicle manufacturing to protect such components, such as components of motor control devices or fuel cells, accordingly. This is particularly important for the following electric motors or generators, for which the stator should be installed in the housing. Therefore, the present invention is explained below on the example of a stator housing. Due to the working principle of the stator, it is constructed as a cylinder. However, instead of the cylindrical shape, the present invention can also be used for square or more complex shaped components. Then, the structure of the flange and the structure of the housing component can be matched to the shape of the component accordingly.

[0018] exist Figure 1 , the stator is shown in a stator housing 10, which is cylindrically shaped. A flange 12 is formed on the lower side of the stator housing 10 in a manner that surrounds the stator housing 10 on the outside and is connected integrally to the stator housing 10. The flange 12 has a second surface 11 that points away from the stator housing 10. The stator housing 10 is located on a pot 13, which is at least partially filled with a liquid sealing material, for example a solution with a plastic material, such as an anaerobic cross-linking acrylate or a room temperature cross-linking silicone.

[0019] exist Figure 2 , the next processing step is shown in which the stator housing 10 is sunk into the pot 13 in the direction of the arrow 14 such that the flange 12 is completely sunk into the plastic material in the pot 13. The sunk depth is ideally selected in this case such that the stator housing 10 is wetted as little as possible by the plastic material, but the plastic material nevertheless completely covers the flange 12 on both sides.

[0020] Then, according to Figure 3 In the next processing step, the stator housing 10 is removed from the pot 13 again in the direction of the arrow 15, wherein the sealing material 17 now adheres to the second surface 11 of the flange 12 and to the first surface 16 of the flange opposite the second surface 11 and pointing toward the stator housing 10.

[0021] When using silicones that crosslink at room temperature, it is now possible to interrupt the processing for a predetermined time after the immersion process so that the sealing material 17 can first harden and then be joined to the other components of the device. Assembly can also be carried out at any later time after hardening. In another embodiment, the stator housing can also be further processed directly with the sealing material 17 not yet hardened.

[0022] according to Figure 4 The further processing is explained in the exploded view in FIG. For this purpose, the stator housing 10 is inserted into the opening 20 of the first housing component 21 so that the flange 12 rests with the second side 16 on the upper side 23 of the first housing component 21. The second housing component 22 is now placed onto the second surface 11 of the flange 12. The sealing material 17 is Figure 4 Not shown, but as in Figure 3 As shown in FIG. 1 , the stator housing is coated on two opposing surfaces 11 and 16. Thus, the finished device is produced by joining the first housing component 21, the component 10 produced as a stator housing, and the second housing component 22.

[0023] An embodiment of a device for assembly is Figure 5 In the embodiment described here, fixing arms 24 and 25 are also formed on the second housing component 22, and screws 26 and 27 can pass through the fixing arms and be embedded in the first housing component 21. This realizes a threaded connection between the second housing component 22 and the first housing component 21, through which pressure can be applied to the flange 12 arranged between the housing components 21 and 22, and also to the space between the housing components 21 and 22 and the flange 12. Figure 5 In another embodiment, a latching connection can be provided between the stator housing 10 and the first housing component 21 by means of latching hooks arranged on both components, which can latch together when the stator housing 10 is pushed into the opening 20 and exert a corresponding pressure on the flange 12 and the seal.

[0024] exist Figure 6 , the connection between the first housing component 21 and the second housing component 22 is shown in detail, wherein the flange 12 is located between the housing components 21 , 22 and the sealing material 17 seals on both sides of the flange 12 relative to the housing components 21 , 22 .

Claims

1. A method for sealing a device, wherein an outer surrounding flange (12) of a component (10) of the device is completely immersed in a fluid sealing material (17) so that the sealing material (17) adheres to the flange (12), and wherein the device is subsequently assembled so that a first surface (16) of the flange (12) is connected to a first housing component (21) and a second surface (11) of the flange (12) opposite to the first surface (16) of the flange is connected to a second housing component (22).

2. The method according to claim 1, characterized in that The assembly of the component (10) and the first and second housing components (21, 22) is carried out before the sealing material (17) is hardened, and the sealing material (17) forms an adhesive connection between the component (10) and the housing components (21, 22).

3. The method according to claim 1, characterized in that After the immersion, the sealing material (17) is first hardened and then the assembly (10) and the housing assembly (21, 22) are assembled.

4. The method according to any one of the preceding claims, characterized in that Pressure is applied to the sealing material (17) applied to the flange (12) at least during assembly of the assembly (10) with the housing assembly (21, 22).

5. The method according to any one of the preceding claims, characterized in that After assembling the component (10) with the housing component (21, 22) or during their assembly, a fixing device (26, 27), in particular at least one screw or at least one clip connection, is arranged or manipulated between the two housing components (21, 22) and / or between a housing component and a component.

6. The method according to any one of the preceding claims, characterized in that A liquid containing at least one plastic, in particular a silicone that cross-links at room temperature or an acrylate that cross-links anaerobically, is used as the sealing material (17).

7. A device, in particular an electrical device, produced according to the method according to any of the preceding claims.

8. The device according to claim 7, characterized in that The assembly (10) has a stator of an electric motor, which has a stator housing, and the stator housing is arranged inside a housing comprising the housing assembly (21, 22).

9. The device according to claim 8, characterized in that The flange (12) is arranged on the upper side or the lower side of the stator housing (10).

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