CN206377352U - Seal assembly - Google Patents

Abstract

The utility model discloses a sealing assembly, which comprises: a housing, on which a through hole allowing a slender element to pass is formed; a rubber sealing ring, which is suitable for being sleeved on the slender element; a metal seal The cover is adapted to fit over the rubber sealing ring and to be connected to the housing. The metal sealing cover is used to press the rubber sealing ring, so as to seal the mating interface between the elongated element and the through hole of the housing through the rubber sealing ring. The sealing assembly also includes a plastic bushing arranged between the metal sealing cover and the rubber sealing ring, so that the metal sealing cover and the rubber sealing ring are not in direct physical contact, thereby effectively preventing the rubber sealing The ring is damaged when it is squeezed.

Description

seal assembly

technical field

The utility model relates to a sealing assembly.

Background technique

In the prior art, it is often necessary to keep the connection ends of the cables sealed in the housing. For example, in electrified railway applications, the connection ends of the cables must be hermetically held in the housing for waterproofing. Currently, in the application of electrified railways, components for sealing cables generally include housings, rubber sealing rings and metal sealing covers. The connection end of the cable extends into the housing through the through hole on the housing, the rubber sealing ring is directly set on the cable and inserted into the through hole of the housing, the metal sealing cover is set on the rubber sealing ring and connected to the housing on the outer wall of the body.

In the prior art, the metal sealing cover is directly pressed on the rubber sealing ring, so that the rubber sealing ring undergoes elastic deformation, so that the mating interface between the cable and the through hole of the housing can be sealed by the rubber sealing ring.

But, there are some following technical problems in existing this sealing assembly:

(1) Since the hardness of the metal sealing cover is much greater than that of the rubber sealing ring, when the metal sealing cover is directly squeezed on the rubber sealing ring, the rubber sealing ring is easily lost, resulting in seal failure;

(2) Due to the interference fit between the metal sealing cover and the rubber sealing ring, there is a large friction force between the metal sealing cover and the rubber sealing ring, which makes it difficult for the metal sealing cover to move from the rubber sealing ring disassembled;

(3) Due to the interference fit between the rubber sealing ring and the through hole of the housing, there is a large friction force between the metal sealing cover and the through hole of the housing, which makes it difficult for the rubber sealing ring to Remove from the housing.

Utility model content

The purpose of this utility model is to solve at least one aspect of the above-mentioned problems and defects existing in the prior art.

An object of the present utility model is to provide a sealing assembly, which can effectively prevent the rubber sealing ring from being damaged when being squeezed.

According to one aspect of the present utility model, a sealing assembly is provided, comprising: a housing, on which a through hole is formed to allow a slender element to pass through; On the element; the metal sealing cover is suitable for fitting on the rubber sealing ring and is suitable for being connected to the housing. The metal sealing cover is used to press the rubber sealing ring, so as to seal the mating interface between the elongated element and the through hole of the housing through the rubber sealing ring. The sealing assembly further includes a plastic bush disposed between the metal sealing cover and the rubber sealing ring, so that the metal sealing cover does not directly physically contact the rubber sealing ring.

According to an exemplary embodiment of the present invention, the rubber sealing ring includes a front part and a rear part, the front part of the rubber sealing ring is suitable for fitting into the through hole of the housing, and the metal sealing cover Suitable for fitting over the rear part of the rubber sealing ring.

According to another exemplary embodiment of the present invention, the rear part of the rubber sealing ring includes a first straight section with a cylindrical outer surface and a first inclined section with a conical outer surface; the straight section Located on the rear side of the inclined section, the conical outer surface of the inclined section gradually expands forward from the straight section.

According to another exemplary embodiment of the present invention, the plastic bushing includes a cylindrical second straight section suitable for fitting on the first straight section of the rubber sealing ring and a cylindrical second straight section suitable for fitting on the rubber sealing ring. The conical second inclined section on the first inclined section of the rubber sealing ring.

According to another exemplary embodiment of the present invention, a cutout is formed on the second inclined section of the plastic bushing so as to increase the elasticity of the second inclined section of the plastic bushing.

According to another exemplary embodiment of the present utility model, the metal sealing cover includes an installation hole, and the inner surface of the installation hole of the metal sealing cover includes an inner surface suitable for being fitted on the plastic bushing in an interference fit manner. A cylindrical third straight section on the second straight section and a conical third inclined section suitable to fit over the second inclined section of the plastic bushing in an interference fit manner.

According to another exemplary embodiment of the present invention, the front part of the rubber sealing ring has a conical outer surface, and the conical outer surface gradually narrows forward from the rear part of the rubber sealing ring; and the The through hole of the casing has a conical inner surface suitable for matching with the conical outer surface of the front part of the rubber sealing ring, and the conical inner surface of the through hole of the casing gradually expands from the inside to the outside.

According to another exemplary embodiment of the present utility model, a plurality of connection holes are formed on the metal sealing cover, and a plurality of threaded holes respectively corresponding to the plurality of connection holes are formed on the housing; The sealing assembly also includes a plurality of threaded connectors, the plurality of threaded connectors are adapted to respectively pass through the plurality of connection holes and be threaded into the plurality of threaded holes, so that the metal sealing cover connected to the housing.

According to another exemplary embodiment of the present invention, the elongated element is a cable.

According to another exemplary embodiment of the present invention, the conical first inclined section of the rubber sealing ring, the conical second inclined section of the plastic bushing and the conical second inclined section of the metal sealing cover The taper of the third inclined section is 1 degree to 30 degrees.

According to another exemplary embodiment of the present invention, the conical first inclined section of the rubber sealing ring, the conical second inclined section of the plastic bushing and the conical second inclined section of the metal sealing cover The taper of the third inclined section is 5 degrees to 15 degrees.

According to another exemplary embodiment of the present invention, the conical first inclined section of the rubber sealing ring, the conical second inclined section of the plastic bushing and the conical second inclined section of the metal sealing cover The taper of the third inclined section is 10 degrees.

According to another exemplary embodiment of the present invention, the conical outer surface of the front part of the rubber sealing ring and the conical inner surface of the through hole of the housing have a taper of 1 degree to 20 degrees.

According to another exemplary embodiment of the present invention, the conical outer surface of the front part of the rubber sealing ring and the conical inner surface of the through hole of the casing have a taper of 3 degrees to 10 degrees.

According to another exemplary embodiment of the present invention, the conical outer surface of the front part of the rubber sealing ring and the conical inner surface of the through hole of the casing have a taper of 6 degrees.

In each of the above exemplary embodiments of the present utility model, since a plastic bushing is provided between the metal sealing cover and the rubber sealing ring, the metal sealing cover will not directly physically contact the rubber sealing ring, thereby effectively To prevent the rubber seal from being damaged when being squeezed.

In addition, in some exemplary embodiments of the utility model, since a conical mating surface is formed on the rubber sealing ring, the plastic bushing and the metal sealing cover, the metal sealing cover can be easily disassembled from the rubber sealing ring down.

In addition, in some exemplary embodiments of the utility model, since a conical mating surface is formed between the rubber sealing ring and the housing, the rubber sealing ring can be easily disassembled from the housing.

Through the following description of the utility model with reference to the accompanying drawings, other purposes and advantages of the utility model will be apparent, and can help to have a comprehensive understanding of the utility model.

Description of drawings

Fig. 1 shows a schematic perspective view of a sealing assembly according to an exemplary embodiment of the present invention;

Figure 2 shows a longitudinal sectional view of the sealing assembly shown in Figure 1;

Fig. 3 shows the three-dimensional schematic view of the rubber sealing ring of the sealing assembly shown in Fig. 1;

Fig. 4 shows the plane view of the rubber sealing ring shown in Fig. 3;

Fig. 5 shows a schematic perspective view of a plastic bushing of the sealing assembly shown in Fig. 1;

Figure 6 shows a cross-sectional view of the plastic bush shown in Figure 5;

Fig. 7 shows a schematic perspective view of the housing of the sealing assembly shown in Fig. 1;

Figure 8 shows a cross-sectional view of the housing shown in Figure 7;

Figure 9 shows a schematic perspective view of the metal sealing cover of the sealing assembly shown in Figure 1; and

FIG. 10 shows a cross-sectional view of the metal sealing cap shown in FIG. 9 .

detailed description

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following descriptions of the embodiments of the utility model with reference to the accompanying drawings are intended to explain the overall utility model concept of the utility model, and should not be construed as a limitation of the utility model.

In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form to simplify the drawings.

According to a general technical idea of the present invention, a sealing assembly is provided, comprising: a housing, on which a through hole is formed to allow a slender element to pass through; a rubber sealing ring, suitable for being sleeved on the On the elongated element; the metal sealing cover is adapted to fit over the rubber sealing ring and to be connected to the housing. The metal sealing cover is used to press the rubber sealing ring, so as to seal the mating interface between the elongated element and the through hole of the housing through the rubber sealing ring. The sealing assembly further includes a plastic bush disposed between the metal sealing cover and the rubber sealing ring, so that the metal sealing cover does not directly physically contact the rubber sealing ring.

FIG. 1 shows a schematic perspective view of a sealing assembly according to an exemplary embodiment of the present invention; FIG. 2 shows a longitudinal sectional view of the sealing assembly shown in FIG. 1 .

As shown in FIGS. 1 and 2 , in the illustrated embodiment, the sealing assembly mainly includes: a housing 100 , a metal sealing cover 200 , a plastic bushing 300 and a rubber sealing ring 400 .

FIG. 7 shows a schematic perspective view of the casing 100 of the sealing assembly shown in FIG. 1 ; FIG. 8 shows a cross-sectional view of the casing 100 shown in FIG. 7 .

As shown in FIGS. 1-2 and 7-8 , in the illustrated embodiment, a through hole 101 is formed on the housing 100 to allow an elongated member 10 to pass through. The rubber sealing ring 400 is suitable for fitting on the elongated element 10 .

As shown in FIGS. 1 and 2 , in the illustrated embodiment, the metal sealing cover 200 is suitable for fitting on the rubber sealing ring 400 and is suitable for being connected to the casing 100 . The plastic bushing 300 is disposed between the metal sealing cover 200 and the rubber sealing ring 400 , so that the metal sealing cover 200 is not in direct physical contact with the rubber sealing ring 400 .

As shown in FIGS. 1 and 2 , in the illustrated embodiment, when the metal sealing cover 200 is connected to the housing 100 , the metal sealing cover 200 squeezes the plastic bushing 300 and extrudes the rubber through the plastic bushing 300 . The sealing ring 400 is such that the rubber sealing ring 400 is elastically deformed, so that the mating interface between the elongated element 10 and the through hole 101 of the housing 100 is sealed by the rubber sealing ring 400 .

FIG. 3 shows a schematic perspective view of the rubber sealing ring 400 of the sealing assembly shown in FIG. 1 ; FIG. 4 shows a plan view of the rubber sealing ring 400 shown in FIG. 3 .

As shown in FIGS. 3 and 4 , in the illustrated embodiment, the rubber seal 400 includes a front portion 410 and a rear portion 420 . As shown in FIGS. 1 and 2 , the front portion 410 of the rubber sealing ring 400 is suitable for fitting into the through hole 101 of the casing 100 , and the metal sealing cover 200 is suitable for being sleeved on the rear portion 420 of the rubber sealing ring 400 .

As shown in FIGS. 3 and 4 , in the illustrated embodiment, the rear portion 420 of the rubber seal 400 includes a first straight section 421 with a cylindrical outer surface and a first inclined section 422 with a conical outer surface. . The straight section 421 is located at the rear side of the inclined section 422 , and the conical outer surface of the inclined section 422 gradually expands forward from the straight section 421 .

FIG. 5 shows a schematic perspective view of the plastic bushing 300 of the sealing assembly shown in FIG. 1 ; FIG. 6 shows a cross-sectional view of the plastic bushing 300 shown in FIG. 5 .

As shown in FIGS. 5 and 6 , in the illustrated embodiment, the plastic bushing 300 includes a cylindrical second straight section 320 suitable for fitting on the first straight section 421 of the rubber sealing ring 400 and a suitable The conical second inclined section 310 is set on the first inclined section 422 of the rubber sealing ring 400 .

As shown in FIGS. 5 and 6 , in the illustrated embodiment, a cutout 311 is formed on the second inclined section 310 of the plastic bushing 300 to increase the elasticity of the second inclined section 310 of the plastic bushing 300 .

FIG. 9 shows a schematic perspective view of the metal sealing cap 200 of the sealing assembly shown in FIG. 1 ; and FIG. 10 shows a cross-sectional view of the metal sealing cap 200 shown in FIG. 9 .

As shown in FIGS. 9 and 10 , in the illustrated embodiment, the metal sealing cover 200 includes a mounting hole 201 , and the inner surface of the mounting hole 201 of the metal sealing cover 200 includes a plastic material that is suitable for being fitted in an interference fit manner. The cylindrical third straight section 220 on the second straight section 320 of the bushing 300 and the conical third inclined section adapted to fit over the second inclined section 310 of the plastic bushing 300 in an interference fit manner paragraph 210.

FIG. 7 shows a schematic perspective view of the casing 100 of the sealing assembly shown in FIG. 1 ; FIG. 8 shows a cross-sectional view of the casing 100 shown in FIG. 7 .

As shown in FIGS. 3-4 and FIGS. 7-8 , in the illustrated embodiment, the front portion 410 of the rubber seal 400 has a conical outer surface 411 , and the conical outer surface 411 extends from the rear portion 420 of the rubber seal 400 . Taper forward. The through hole 101 of the housing 100 has a conical inner surface 110 suitable for matching with the conical outer surface 411 of the front part 410 of the rubber sealing ring 400, and the conical inner surface 110 of the through hole 101 of the housing 100 gradually expand.

As shown in Figures 1-2 and Figures 7-10, in the illustrated embodiment, a plurality of connection holes 202 are formed on the metal sealing cover 200, and a plurality of connection holes 202 corresponding to the plurality of connection holes 202 are formed on the housing 100. A plurality of threaded holes 102. The sealing assembly also includes a plurality of threaded connectors 500, which are adapted to pass through the plurality of connection holes 202 and threaded into the plurality of threaded holes 102, so as to connect the metal sealing cover 200 to the housing 100 .

As shown in Figures 1-2, in the illustrated embodiment, the elongated member 10 may be a cable.

In one embodiment of the present utility model, as shown in FIGS. The taper of the conical third inclined section 210 of 200 may be 1 degree to 30 degrees, preferably 5 degrees to 15 degrees, more preferably 10 degrees.

In one embodiment of the present utility model, as shown in FIGS. 3-4 and 7-8, the conical outer surface 411 of the front part 410 of the rubber sealing ring 400 and the conical inner surface of the through hole 101 of the housing 100 The taper of 110 may be 1 degree to 20 degrees, preferably 3 degrees to 10 degrees, more preferably 6 degrees.

Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can improve them, and the structures described in various embodiments do not conflict with each other in terms of structure or principle Can be combined freely.

Although the utility model has been described in conjunction with the drawings, the embodiments disclosed in the drawings are intended to illustrate the preferred implementation of the utility model, and should not be construed as a limitation of the utility model.

While certain embodiments of the present general inventive concept have been shown and described, those of ordinary skill in the art will appreciate that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the present invention The scope of the utility model is defined by the claims and their equivalents.

It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Additionally, any element references in the claims should not be construed as limiting the scope of the present invention.

Claims (15)

1. A sealing assembly comprising: a housing (100), on which a through hole (101) is formed to allow an elongated element (10) to pass through; a rubber sealing ring (400), adapted to fit over said elongated element (10); a metal sealing cover (200), suitable for fitting on the rubber sealing ring (400), and suitable for being connected to the housing (100), Wherein, the metal sealing cover (200) is used to squeeze the rubber sealing ring (400), so as to seal the elongated element (10) and the housing (100) through the rubber sealing ring (400). ) with the interface between the through holes (101), It is characterized by: The sealing assembly also includes a plastic bushing (300) arranged between the metal sealing cover (200) and the rubber sealing ring (400), so that the metal sealing cover (200) and the rubber sealing ring (400) No direct physical contact. 2. The seal assembly of claim 1, wherein: The rubber sealing ring (400) includes a front part (410) and a rear part (420), and the front part (410) of the rubber sealing ring (400) is adapted to fit into the through hole ( 101), the metal sealing cover (200) is suitable for fitting on the rear part (420) of the rubber sealing ring (400). 3. The seal assembly of claim 2, wherein: The rear portion (420) of the rubber sealing ring (400) includes a first straight section (421) with a cylindrical outer surface and a first inclined section (422) with a conical outer surface; The straight section (421) is located on the rear side of the inclined section (422), and the conical outer surface of the inclined section (422) gradually expands forward from the straight section (421). 4. The seal assembly of claim 3, wherein: The plastic bushing (300) includes a cylindrical second straight section (320) suitable for fitting on the first straight section (421) of the rubber sealing ring (400) and a cylindrical second straight section (320) suitable for fitting on the The conical second inclined section (310) on the first inclined section (422) of the rubber sealing ring (400). 5. The seal assembly of claim 4, wherein: A cutout (311) is formed on the second inclined section (310) of the plastic bushing (300), so as to increase the elasticity of the second inclined section (310) of the plastic bushing (300). 6. The seal assembly of claim 4, wherein: The metal sealing cover (200) includes a mounting hole (201), and the inner surface of the mounting hole (201) of the metal sealing cover (200) includes an inner surface suitable for being fitted on the plastic bushing (201) in an interference fit manner. The cylindrical third straight section (220) on the second straight section (320) of 300) and the second inclined section (310) suitable for fitting in the plastic bushing (300) in an interference fit manner ) on the conical third inclined section (210). 7. The seal assembly of claim 2, wherein: The front portion (410) of the rubber sealing ring (400) has a conical outer surface (411), and the conical outer surface (411) gradually shrink; and The through hole (101) of the housing (100) has a conical inner surface (110) adapted to cooperate with the conical outer surface (411) of the front portion (410) of the rubber sealing ring (400), so The conical inner surface (110) of the through hole (101) of the casing (100) gradually expands from the inside to the outside. 8. The seal assembly of claim 1, wherein: A plurality of connecting holes (202) are formed on the metal sealing cover (200), and a plurality of threaded holes (102) respectively corresponding to the plurality of connecting holes (202) are formed on the housing (100). ); The sealing assembly also includes a plurality of threaded connectors (500), and the plurality of threaded connectors (500) are adapted to respectively pass through the plurality of connection holes (202) and be screwed to the plurality of threaded holes respectively (102), so as to connect the metal sealing cover (200) to the housing (100). 9. Sealing assembly according to claim 1, characterized in that said elongated element (10) is an electrical cable. 10. The seal assembly of claim 6, wherein: The conical first inclined section (422) of the rubber sealing ring (400), the conical second inclined section (310) of the plastic bushing (300) and the conical section of the metal sealing cover (200) The taper of the shaped third inclined section (210) is 1 degree to 30 degrees. 11. The seal assembly of claim 10, wherein: The conical first inclined section (422) of the rubber sealing ring (400), the conical second inclined section (310) of the plastic bushing (300) and the conical section of the metal sealing cover (200) The taper of the third inclined section (210) is 5 degrees to 15 degrees. 12. The seal assembly of claim 11, wherein: The conical first inclined section (422) of the rubber sealing ring (400), the conical second inclined section (310) of the plastic bushing (300) and the conical section of the metal sealing cover (200) The taper of the third inclined section (210) of the shape is 10 degrees. 13. The seal assembly of claim 7, wherein: The taper of the conical outer surface (411) of the front portion (410) of the rubber sealing ring (400) and the conical inner surface (110) of the through hole (101) of the housing (100) is from 1 degree to 20 degrees. 14. The seal assembly of claim 13, wherein: The taper of the conical outer surface (411) of the front portion (410) of the rubber sealing ring (400) and the conical inner surface (110) of the through hole (101) of the housing (100) is 3 degrees to 10 degrees. 15. The seal assembly of claim 14, wherein: The taper of the conical outer surface (411) of the front part (410) of the rubber sealing ring (400) and the conical inner surface (110) of the through hole (101) of the housing (100) is 6 degrees.