Sealing connection device for new energy automobile wire harness

Abstract

The utility model discloses a sealing connection device for a wire harness of a new energy automobile, which comprises a heat-shrinkable sleeve, and one end of the heat-shrinkable sleeve is provided with a closing end with a smaller pipe diameter; the rubber plug is arranged in the closing end; the external thread bushing is adhered to the closing end, the section of the external thread bushing is U-shaped, and the external thread bushing is clamped at the closing end; the ventilation cover is connected with the external thread bushing through threads, a supporting rib net is arranged in the ventilation cover, a waterproof ventilation film is welded to the outer side of the supporting rib net, and a plurality of ventilation holes are formed in the end, located outside the waterproof ventilation film, of the ventilation cover. According to the utility model, the heat-shrinkable sleeve is designed into three layers, the outer layer is shaped at low temperature, and the inner layer is sealed at high temperature, so that staged shrinkage is realized, and wrinkles caused by stress concentration are avoided. The middle layer is provided with conductive copper mesh wires, so that electromagnetic shielding is improved. The end part of the heat-shrinkable sleeve is closed up, so that the outer end of the wire harness is stable, an internal rubber plug is used for anti-skid positioning, an external thread is provided with a breathable cover, a waterproof breathable film in the breathable cover is used for releasing balanced air pressure, and the waterproof breathable and sealing performance is good.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile wire harness, concretely relates to a sealing connecting device for new energy automobile wire harness. BACKGROUND

[0002] With the popularization of current new energy, more and more automobiles select new energy as power, and the new energy automobile needs to be equipped with many wire harnesses, which are divided into high-voltage wire harness and low-voltage wire harness, and in the production, transportation and storage process of automobile wire harness, in order to ensure the waterproofness in the early stage and take into account the release of air pressure, humidity and the like in the wire harness, the end of the wire harness needs to be protected in a sealed manner, and the sealing here means waterproof and moisture-proof sealing with air permeability. In the past, simple coating, hot shrink tube and adhesive tape are used, but the waterproof and air permeability are poor. There are also waterproof and air permeable caps for silicone sleeve installation, which are more troublesome to install. First, a corresponding bottom shell needs to be selected, and the adaptability is very poor. In addition, a pipe sleeve needs to be added for the installation of the air permeable cap, and the overall applicability is poor.

[0003] Therefore, there is an urgent need for a sealing connecting device which is convenient to use and can ensure the sealing, waterproofness and air permeability of the end of the wire harness. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model wants to solve the technical problem to provide a sealing connecting device for new energy automobile wire harness, which is used to avoid the lack of effective sealing connecting device when the automobile wire harness is transported in the past, leading to poor waterproof and air permeability in the interior.

[0005] In order to solve the above technical problem, the utility model discloses a sealing connecting device for new energy automobile wire harness, which comprises:

[0006] The heat shrink sleeve has three layers, including an outer polyolefin layer, a middle copper mesh layer and an inner fluororubber layer, and one end of the heat shrink sleeve has a small-diameter closed end;

[0007] The rubber plug is arranged in the closed end;

[0008] The outer thread bushing is adhered to the closed end, and the outer thread bushing has a U-shaped cross section and is clamped to the closed end;

[0009] The air permeable cover is connected to the outer thread bushing through threads, the air permeable cover is internally provided with a support mesh, the outer side of the support mesh is welded with a waterproof and air permeable film, and the air permeable cover is provided with a plurality of air permeable holes at the end away from the waterproof and air permeable film.

[0010] According to one embodiment of the utility model, the inside of the support mesh is fixedly provided with a containing column, the containing column is provided with a through hole on the surface, and the inside of the containing column is provided with a drying agent. The containing column is introduced into the closed end, and has a spacing with the rubber plug.

[0011] According to an embodiment of the present application, the rubber plug is in interference fit with the wire harness.

[0012] According to an embodiment of the present application, the inner wall of the heat shrink sleeve is provided with a plurality of waist round grooves in axial direction.

[0013] According to an embodiment of the present application, the waterproof and breathable membrane is made of polytetrafluoroethylene.

[0014] According to an embodiment of the present application, the thickness of the rubber plug is 1-2mm.

[0015] Compared with the prior art, the present application can obtain the following technical effects:

[0016] The heat shrink sleeve is designed in three layers, the outer layer is made of polyolefin with shrinkage temperature of 70℃, the inner layer is made of fluororubber with shrinkage temperature of 90℃, the outer layer is first shaped at low temperature, and the inner layer is sealed at high temperature, realizing stage-by-stage shrinkage and avoiding wrinkles caused by stress concentration. The middle layer is provided with copper mesh wire for electric conduction, improving electromagnetic shielding.

[0017] The end of the heat shrink sleeve is closed, realizing stable outer end of the wire harness, anti-slip positioning of the inner rubber plug, threaded installation of the breathable cover outside, releasing balanced air pressure by the waterproof and breathable membrane inside, waterproof and breathable, and good sealing performance.

[0018] The breathable cover is provided with a drying agent inside, capable of preventing moisture.

[0019] Of course, any product implementing the present application does not necessarily need to achieve all the technical effects mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitation of the present application. In the drawings:

[0021] Figure 1 is a schematic view of the sealing connection device for wire harness of new energy automobile according to an embodiment of the present application.

[0022] IDENTIFICATION OF DRAWINGS

[0023] Heat shrink sleeve 10, closed end 11, rubber plug 20, outer threaded bushing 30, breathable cover 40, waterproof and breathable membrane 50, air vent hole 60, accommodating column 70. DETAILED DESCRIPTION

[0024] The implementation of the present application will be described in detail below with reference to the accompanying drawings and embodiments, so that the realization process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented.

[0025] Please refer to Figure 1 , Figure 1 is a schematic diagram of a sealing connection device for a new energy automobile wire harness according to an embodiment of the present application.

[0026] As shown in the figure, a sealing connection device for a new energy automobile wire harness comprises a heat shrinkable sleeve 10, the heat shrinkable sleeve 10 has three layers, including an outer polyolefin layer, a middle copper mesh layer, and an inner fluororubber layer, and the heat shrinkable sleeve 10 has a small-diameter closed end 11 at one end; a rubber plug 20 arranged in the closed end 11; an outer threaded bushing 30 adhered to the closed end 11, the outer threaded bushing 30 has a U-shaped cross section and is clamped to the closed end 11; a breathable cover 40 connected to the outer threaded bushing 30 by threads, the breathable cover 40 has a support mesh arranged inside, and a waterproof and breathable film 50 is welded to the outside of the support mesh, and the breathable cover 40 has a plurality of air holes 60 arranged at the outer end of the waterproof and breathable film 50.

[0027] In an embodiment of the present application, the heat shrinkable sleeve 10 has a three-layer structure, the outer layer is made of a polyolefin layer with a shrinkage temperature of 70-90℃, and the inner layer is made of a fluororubber layer with a shrinkage temperature of 90-120℃. The outer layer is first shaped at a low temperature, and the inner layer is sealed at a high temperature, realizing staged shrinkage and enhancing the shrinkage effect. The middle copper mesh layer can enhance electromagnetic shielding, and the three layers are formed by co-extrusion.

[0028] The overall heat shrinkable sleeve 10 is in the shape of a tapered cylinder, the front end has a reduced diameter and is closed, forming a closed end 11, which facilitates the installation of a breathable cover 40 for sealing. This section does not need to be heat shrunk, and the rear end has a larger diameter to cover the wire harness and complete the heat shrinkage sealing.

[0029] A rubber plug 20 is adhered inside the closed end 11, and the rubber plug 20 is in interference fit with the wire harness with a thickness of 1-2mm. It can be positioned and increase friction to prevent movement. The U-shaped outer threaded bushing 30 is inserted into the closed end 11 from the outside, and a lightweight plastic part can be selected. The outside is provided with threads, which are adhered and fixed to the closed end. The two are in interference fit, and finally the breathable cover 40 is installed. The waterproof and breathable film 50 is installed inside the breathable cover 40 through the support mesh, and the air holes 60 are arranged at the outer end of the waterproof and breathable film 50, realizing the waterproof and breathable effect. Preferably, the waterproof and breathable film 50 is made of a polytetrafluoroethylene film, which has good waterproof and breathable effect.

[0030] In addition, a containing column 70 is fixed in the center of the support mesh, the containing column 70 has a through hole on the surface, and a drying agent is arranged inside. The containing column is introduced into the closed end 11 and has a spacing with the rubber plug 20. The addition of the drying agent can further prevent moisture.

[0031] The inner wall of the heat shrinkable sleeve 10 is provided with a plurality of waist round grooves in the axial direction. After heat shrinkage, gaps are formed, friction is increased, and stability is enhanced.

[0032] In summary, the utility model discloses a three-layer design heat shrinkable sleeve, the outer layer adopts polyolefin shrinkage temperature 70 DEG C, the inner layer adopts fluorine rubber shrinkage temperature 90 DEG C, the outer layer low temperature is first fixed, and the inner layer high temperature is sealed, realizes the shrinkage of stage, avoids the wrinkle caused by stress concentration. The middle layer is provided with the copper mesh silk of electric conduction, improves electromagnetic shielding. The heat shrinkable sleeve end is closed, realizes the stable of wire harness outer end, and the inside rubber plug is anti -skidding positioning, and the outside thread installation is breathable cover, utilizes waterproof breathable membrane in it and releases balance air pressure, and waterproof is breathable, and the sealing performance is good. The dry agent is equipped in the breathable cover, can prevent damp.

[0033] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the utility model concept described herein by the above teaching or related technical or knowledge. The change and variation made by the person skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the protection scope of the claims attached to the utility model.

Claims

1. A sealing connection device for wiring harnesses in new energy vehicles, characterized in that, include: A heat shrinkable sleeve has three layers, including an outer polyolefin layer, a middle copper mesh layer, and an inner fluororubber layer, and one end of the heat shrinkable sleeve has a constricted end with a smaller diameter. A rubber stopper is provided inside the constricted end; An external threaded bushing is bonded to the closing end, the external threaded bushing having a U-shaped cross-section and being clamped to the closing end; The vent cover is connected to the external threaded bushing by a thread. The vent cover has a supporting rib mesh inside. A waterproof and breathable membrane is welded to the outside of the supporting rib mesh. The vent cover has multiple vent holes at the outer end of the waterproof and breathable membrane.

2. The sealing connection device for new energy vehicle wiring harnesses according to claim 1, characterized in that, The inner center of the supporting rib mesh is fixed with a receiving column. The surface of the receiving column is provided with a through hole and a desiccant is placed inside. The receiving column is introduced into the closing end and is spaced apart from the rubber plug.

3. The sealing connection device for new energy vehicle wiring harnesses according to claim 1, characterized in that, The rubber plug is interference-fitted with the wire harness.

4. The sealing connection device for new energy vehicle wiring harnesses according to claim 1, characterized in that, The inner wall of the heat shrink sleeve is provided with multiple oval grooves along the axis.

5. The sealing connection device for new energy vehicle wiring harnesses according to claim 1, characterized in that, The waterproof and breathable membrane is a polytetrafluoroethylene membrane.

6. The sealing connection device for new energy vehicle wiring harnesses according to claim 1, characterized in that, The thickness of the rubber stopper is 1-2 mm.

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