CN219834560U - Sealing assembly for a control device of an electrically heated catalytic converter - Google Patents

Abstract

The utility model relates to a sealing assembly for a control device of an electrically heated catalytic converter, comprising an upper housing, a lower housing, a plug part which passes through a side opening in the upper housing, and sealing rings which are arranged on the plug part and are used for sealing the plug part relative to the upper housing and the lower housing, wherein a first bead sealing part is formed between the sealing rings and the upper housing in the area where the sealing rings are in sealing contact with the upper housing, the plug part and the lower housing, a second bead sealing part is formed between the sealing rings and the plug part, and a third bead sealing part is formed between the sealing rings and the lower housing. And in the state that the upper shell is fixed on the lower shell, interference fit is realized among the sealing ring, the upper shell, the plug connector and the lower shell, so that a stable and good sealing effect is realized.

Description

Sealing assembly for a control device of an electrically heated catalytic converter

Technical Field

The present utility model relates to a seal assembly for a control device of an electrically heated catalyst.

Background

At present, most control devices for electric heating catalysts belong to large-power automobile electronic parts, the maximum running current reaches more than 100A, and the running temperature is more than 100 ℃. Because the use environment needs to have higher dustproof and waterproof requirement, in order to ensure that the product function failure and the automobile fire caused by product water inlet can not be caused in the operation process of the control device for the electric heating catalyst, the dustproof and waterproof requirement of the control device can reach the protection level requirement above IP 67. The difficulty of waterproofing the control device is concentrated on the sealing between the plug and the upper and lower housings. Accordingly, there is a need for a seal assembly for a control device of an electrically heated catalyst that achieves a stable and good seal between the plug and the upper and lower housings.

Disclosure of Invention

The object of the present utility model is therefore to provide a sealing assembly for a control device of an electrically heated catalytic converter, by means of which a stable and good seal between the plug-in connection and the upper and lower housing can be ensured.

According to the utility model, a sealing arrangement for a control device of an electrically heated catalytic converter is provided, which is arranged in an engine compartment and is designed to control the operating parameters of the electrically heated catalytic converter, characterized in that the sealing arrangement comprises an upper housing, a lower housing, a plug-in element which passes through a side opening in the upper housing, and a sealing ring which is arranged on the plug-in element and is designed to seal the plug-in element relative to the upper housing and the lower housing, the side opening being open in the direction of the lower housing, wherein in the region of the sealing ring which is in sealing contact with the upper housing, the plug-in element and the lower housing, a first bead seal is formed between the sealing ring and the upper housing, the first bead seal is formed by an elastic sealing bead in the region of the sealing ring which is in contact with the upper housing or a rigid upper housing bead which is raised above the upper housing, a second bead seal is formed between the sealing ring and the plug-in the upper housing, the bead seal is formed by a third bead which is arranged circumferentially around the plug-in the upper housing or the lower housing for receiving the plug-in the sealing ring, the bead is formed between the bead and the upper housing or the lower housing, the bead is in the sealing bead being in contact with the upper housing and the bead being in the sealing region of the upper housing.

In the seal assembly for the control device of the electric heating catalyst according to the present utility model, by constructing the first bead seal portion between the seal ring and the upper housing, constructing the second bead seal portion between the seal ring and the plug, and constructing the third bead seal portion between the seal ring and the lower housing, it is possible to achieve an interference fit between the seal ring and the upper housing, the plug, and the lower housing in a fixed state, thereby achieving a stable and good sealing effect.

In some embodiments, a first upper housing recess is formed in the upper housing in the region of the lateral opening of the upper housing, and a sealing ring projection which cooperates with the first upper housing recess is formed on the sealing ring.

In some embodiments, the first bead seal is configured in a contact area between a bottom surface of the first upper housing groove and an end surface of the seal ring protrusion.

In some embodiments, the first upper housing groove is in sealing engagement with the sealing ring protrusion.

In some embodiments, at least two second bead seals are configured between the seal ring and the plug.

In some embodiments, a lower housing projection is provided circumferentially on the lower housing, and a seal ring groove is provided in the lower section of the seal ring that mates with the lower housing projection.

In some embodiments, a first gap is present between the lower housing protrusion and the seal ring groove, the first gap being filled with a sealant.

In some embodiments, a second upper housing groove is configured in a lower section of the upper housing that mates with the lower housing protrusion, there being a second gap between the lower housing protrusion and the second upper housing groove, the second gap being filled with sealant.

In some embodiments, a third bead seal is configured between the seal ring and the lower housing on each side of the mating structure formed by the lower housing protrusion and the seal ring groove.

In some embodiments, a locking mechanism is provided by which the upper housing can be fixedly connected to the lower housing so as to generate a compressive force that creates an interference fit for the first bead seal, the second bead seal, and the third bead seal.

In some embodiments, the locking mechanism comprises a threaded connection.

In some embodiments, the seal ring is made of silica gel that is resistant to high and low temperatures.

Drawings

The utility model is further described below with the aid of exemplary embodiments with reference to the accompanying schematic drawings. Wherein:

FIG. 1 is a schematic perspective view of a seal assembly for a control device of an electrically heated catalyst in accordance with one embodiment of the utility model.

Fig. 2 is a schematic cross-sectional view of the seal assembly of fig. 1.

FIG. 3 is a schematic perspective view of a seal assembly without a lower housing according to one embodiment of the utility model.

Fig. 4 is a schematic perspective view of an upper housing according to one embodiment of the present utility model.

Fig. 5 is a schematic perspective view of a seal ring according to one embodiment of the utility model.

Fig. 6 is a front view of the seal ring of fig. 5.

Fig. 7 is a side view of the seal ring of fig. 5.

Detailed Description

The sealing assembly of the control device for an electrically heated catalyst according to the present utility model is described in detail below with reference to fig. 1 to 7.

Referring first to fig. 1 to 3, the sealing assembly according to the utility model comprises an upper housing 1, a lower housing 3, a plug 2 which passes through a side opening 11 in the upper housing 1, and a sealing ring 4 which is fitted over the plug 2 for sealing the plug 2 against the upper housing 1 and the lower housing 3. As is clearly shown in fig. 4, the upper housing 1 is configured as a basin, and a side opening 11, which is open to the lower housing 3, is provided on the side of the upper housing 1 for the plug connector 2 to pass through. When the control device is installed, after the plug connector 2 and the PCBA board 8 are welded, the seal ring 4 may be sleeved on the plug connector 2. The plug connector 2 with the sealing ring 4 can then be placed into the side opening 11 of the upper housing 1 for the plug connector 2, wherein the sealing ring 4 is located in the side opening 11. The lower housing 3 can then be placed on the upper housing 1 and the lower housing 3 and the upper housing 1 are fixedly connected by means of the locking mechanism 9. In this embodiment, the locking mechanism 9 comprises a threaded connection, such as a screw. In other implementations, the locking mechanism 9 may also include other mechanical structures for applying a compressive force between the upper housing 1 and the lower housing 3.

As shown in fig. 2, in the region where the seal ring 4 is in sealing contact with the upper housing 1, the plug connector 2 and the lower housing 3, a first bead seal 5 is formed between the seal ring 4 and the upper housing 1, a second bead seal 6 is formed between the seal ring 4 and the plug connector 2, and a third bead seal 7 is formed between the seal ring 4 and the lower housing 3, the first bead seal 5, the second bead seal 6 and the third bead seal 7 being subjected to a pressing force generated by the locking mechanism 9 when the upper housing 1 and the lower housing 3 are fixedly connected by the locking mechanism 9 and thus an interference fit occurs between the seal ring 4 and the upper housing 1, the plug connector 2 and the lower housing 3. The interference fit may be an interference generated by pressing the sealing ring 4 into the corresponding rigid ribs on the upper casing 1, the plug connector 2 or the lower casing 3, or an interference generated by flattening the corresponding elastic ribs on the sealing ring 4 by the contact surface of the upper casing 1, the plug connector 2 or the lower casing 3. In the exemplary embodiment shown in fig. 2, the first bead seal 5 and the second bead seal 6 are formed by corresponding elastic sealing beads on the sealing ring 4, while the second bead seal 6 is formed by a rigid lower housing 3 bead protruding above the lower housing 3, wherein the first bead seal 5 is formed by an elastic sealing bead on the sealing ring 4 in the region contacting the upper housing 1, while the second bead seal 6 is formed by an elastic sealing bead circumferentially arranged on the opening of the sealing ring 4 for receiving the plug part 2. The specific structure of the first bead seal 5 and the second bead seal 6 can be seen more clearly in fig. 5 to 7. Other possibilities are of course conceivable in addition to the embodiment shown in fig. 2. In some embodiments, the first bead seal 5 may also be formed by a rigid upper housing bead protruding above the upper housing 1. In some embodiments, the second bead seal 6 may also be formed by a rigid plug bead protruding above the plug 2. In some embodiments, the third bead seal 7 may also be formed by an elastic sealing bead. As can also be seen clearly in fig. 2, at least two second bead seals 6 are formed between the sealing ring 4 and the plug connector 2. Thereby, a more reliable and better sealing effect can be achieved than if only one second bead seal 6 is provided. In the embodiment shown in fig. 2, two second bead seals 6 are provided. In some embodiments, more than two second bead seals 6 may also be provided. These second bead seals 6 may be identical to each other or may be different. For example, one of the second bead seals 6 may be formed by an elastic sealing bead, while the other second bead seal 6 may be formed by a rigid plug bead. It is to be noted here that the elastic bead of the sealing ring in fig. 2 is shown in an uncrushed form for the sake of clarity. In practice, the resilient bead of the sealing ring will take on a flattened form due to the application of the compressive force.

Here, after the upper case 1 and the lower case 3 are locked by the locking mechanism 9, the first bead seal portion 5, the second bead seal portion 6, and the third bead seal portion 7 can be kept to reach a stable maximum interference, and a stable and good sealing effect is achieved by interference fit between the upper case 1, the seal ring 4, the plug connector 2, and the lower case 3.

As can be seen in fig. 2 to 5, a first upper housing recess 12 is formed in the upper housing 1 in the region of the side opening 11 of the upper housing 1, and a sealing ring projection 41 is formed on the sealing ring 4, which engages in the first upper housing recess 12. Thereby, the sealing ring 4 can be clamped in the side opening 11 of the upper housing 1. In addition, the clamping structure of the sealing ring 4 clamped on the first upper shell groove 12 forms a stepped sealing structure, so that the sealing effect is further enhanced. Fig. 2 shows a snap-in connection of a first upper housing groove 12 with a sealing ring projection 41. In some embodiments, two or more first upper housing grooves 12 and two or more sealing ring protrusions 41 corresponding thereto may also be provided. Thus, a "labyrinth" seal structure may be formed. The first bead seal 5 is formed in the contact region between the bottom surface of the first upper housing groove 12 and the end surface of the seal ring projection 41. The first upper housing groove 12 is in sealing engagement with the sealing ring protrusion 41. By a tight sealing engagement of the sealing ring projection 41 with the first upper housing groove 12, a better sealing effect can be achieved.

As shown in fig. 2, a lower case protrusion 31 is provided on the lower case 3. The lower housing projection 31 is arranged circumferentially on the lower housing 3. As is clear from fig. 5, a sealing ring groove 42 is provided in the lower section of the sealing ring 4, which engages with the lower housing projection 31. As can be clearly seen from fig. 2, a first gap 32 is present between the lower housing projection 31 and the sealing ring groove 42. The first gap 32 may be filled with a sealant. Furthermore, as is clear from fig. 3 and 4, a second upper housing recess 13 is formed in the lower section of the upper housing 1 in the region of the side opening 11, which recess cooperates with the lower housing projection 31. A second gap, not shown, may exist between the lower housing protrusion 31 and the second upper housing groove 13. The second gap may be filled with a sealant. In the case where the lower case protrusion 31 is present, as shown in fig. 2, third bead seals 7 are respectively configured between the seal ring 4 and the lower case 3 on both sides of the mating structure constituted by the lower case protrusion 31 and the seal ring groove 42. In the present embodiment, a third bead seal 7 is formed on both sides of the mating structure constituted by the lower case protrusion 31 and the seal ring groove 42, respectively. In some embodiments, two or more third bead seals 7 may be respectively formed on both sides of the mating structure.

The seal ring 4 is described in detail below with reference to fig. 5 to 7. As described above, in the present embodiment, depending on the structure of the upper housing 1, the first bead seal 5 is formed by one continuous elastic bead on the upper side and the left and right sides of the seal ring 4, and the second bead seal 6 is formed by two elastic beads circumferentially provided on the opening of the seal ring 4 for receiving the plug connector 2. Further, corresponding to the first bead seal 5, a seal ring protrusion 41 is further configured at the upper side and the left and right sides of the seal ring 4, and the seal ring protrusion 41 is adapted to be engaged into the first upper case groove 12 of the upper case 1 to form a stepped seal structure. The corresponding sealing bead for forming the first bead seal 5 is then formed on the end face of the sealing bead bulge 41. In the lower section of the sealing ring 4, a sealing ring groove 42 is formed, which sealing ring groove 42 cooperates with the lower housing projection 31 on the lower housing 3 for sealing. The respective sealing ring 4 for forming the first bead seal 5 extends up to the sealing ring groove 42, so that the sealing ring 4 is continuously sealed with respect to the upper and lower cases 1 and 3.

It is noted that the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "comprises" and "comprising," and other similar terms, when used in this specification, specify the presence of stated operations, elements, and/or components, but do not preclude the presence or addition of one or more other operations, elements, components, and/or groups thereof. The term "and/or" as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, like reference numerals always denote like elements.

The thickness of elements in the drawings may be exaggerated for clarity. It will also be understood that if an element is referred to as being "on", "coupled" or "connected" to another element, it can be directly on, coupled or connected to the other element or one or more intervening elements may be present therebetween. Conversely, if the expressions "directly on … …", "directly coupled to … …" and "directly connected to … …" are used herein, it is intended that there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted similarly such as "between … …" and "directly between … …", "attached" and "directly attached", "adjacent" and "directly adjacent", and so forth.

Terms such as "top," "bottom," "over," "under," and the like are used herein to describe one element, layer or region's relationship to another element, layer or region as illustrated in the figures. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the figures.

It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Thus, a first element could be termed a second element without departing from the teachings of the present inventive concept.

It is also contemplated that all of the exemplary embodiments disclosed herein may be arbitrarily combined with one another.

Finally, it is pointed out that the above embodiments are only intended to understand the utility model and do not limit the scope of protection thereof. Modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the utility model so modified beyond the scope of the present utility model.

Claims (10)

1. A sealing arrangement for a control device of an electrically heated catalytic converter, which is arranged in an engine compartment and is designed to control operating parameters of the electrically heated catalytic converter, characterized in that the sealing arrangement comprises an upper housing (1), a lower housing (3), a plug-in part (2) which passes through a side opening (11) in the upper housing and a sealing ring (4) which is arranged on the plug-in part and is used for sealing the plug-in part relative to the upper housing and the lower housing, the side opening being open in the direction of the lower housing, wherein a first bead seal (5) is formed between the sealing ring and the upper housing in the region of the sealing ring in sealing contact with the upper housing, the plug-in part and the lower housing, the first bead seal is formed by an elastic sealing bead in the region of the sealing ring which is in contact with the upper housing or by a rigid upper housing bead which protrudes above the upper housing, a second bead seal (6) is formed between the sealing ring and the plug, which is formed by an elastic sealing bead which is arranged circumferentially on the opening of the sealing ring for receiving the plug or by a rigid plug bead which protrudes above the plug, and a third bead seal (7) is formed between the sealing ring and the lower housing, which is formed by an elastic sealing bead in the region of the sealing ring which is in contact with the lower housing or by a rigid lower housing bead which protrudes above the lower housing, wherein, with the upper housing fixed to the lower housing, the sealing ring is connected to the upper housing, the plug connector and the lower shell are in interference fit.

2. A sealing assembly for a control device of an electrically heated catalytic converter according to claim 1, characterized in that a first upper housing groove (12) is formed on the upper housing in the area of the lateral opening of the upper housing, and a sealing ring projection (41) cooperating with the first upper housing groove is formed on the sealing ring.

3. The seal assembly for a control device of an electrically heated catalyst as set forth in claim 2 wherein said first bead seal is configured in a contact area between a bottom surface of the first upper housing groove and an end surface of the gasket boss.

4. The seal assembly for a control device of an electrically heated catalyst as set forth in claim 2 wherein said first upper housing groove sealingly engages a sealing ring projection.

5. The sealing assembly for a control device of an electrically heated catalyst as in any of claims 1-4, wherein at least two second bead seals are configured between the sealing ring and the plug.

6. A sealing assembly for a control device of an electrically heated catalyst as in any of claims 1 to 4, characterized in that a lower housing projection (31) is circumferentially provided on the lower housing, and a sealing ring groove (42) is provided in the lower section of the sealing ring which cooperates with the lower housing projection.

7. The sealing assembly for a control device of an electrically heated catalyst according to claim 6, wherein a first gap (32) is present between the lower housing projection and the sealing ring groove, the first gap being filled with a sealant.

8. The sealing assembly for a control device of an electrically heated catalyst according to claim 6, characterized in that in the lower section of the upper housing, in the region without side openings, a second upper housing recess (13) is formed which cooperates with a lower housing projection, between which a second gap is present, in which a sealing compound is filled.

9. The sealing assembly for a control device of an electrically heated catalyst according to claim 6, wherein a third bead seal is formed between the seal ring and the lower housing on both sides of the mating structure formed by the lower housing protrusion and the seal ring groove, respectively.

10. Sealing assembly for a control device of an electrically heated catalyst according to any of claims 1 to 4, characterized in that a locking mechanism (9) is provided, by means of which the upper housing can be fixedly connected to the lower housing in order to generate a pressing force which causes an interference fit of the first bead seal, the second bead seal and the third bead seal.