Intermediate structure for preventing siphoning and capillary effect of wire harness

Abstract

The utility model provides an intermediate structure for preventing siphoning and capillary effect of a wire harness, which comprises an electric wire and a plastic shell, part of a wire is exposed from the electric wire, the plastic shell is sleeved outside the electric wire, and the plastic shell is positioned outside the wire and insulating layers at two ends of the wire; and sealant is injected into the plastic shell. According to the utility model, a part of the insulating layer of the wire is stripped to expose the conductor part, the conductor part is arranged in the plastic shell, and the plastic shell is filled with the sealant, so that the wire can be separated, the siphonic effect and the capillary effect of the wire can be prevented, and water can be prevented from entering a device end along a wire harness; the utility model has the advantages of simple structure, easiness in manufacturing, good sealing performance and capability of realizing automation and batch production.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile wiring harnesses, in particular to an intermediate structure for preventing siphoning and capillary effects of wiring harnesses. Background Art

[0002] The waterproofness of the wiring harness in the wet area of ​​the car is usually ensured by a closed structure consisting of a connector mating gasket, a connector and wire matching waterproof plug, and a wire insulation layer. Water ingress into the wiring harness in the wet area can cause rust and corrosion of electrical components, increased circuit impedance, and loss of contact, which can lead to partial or complete loss of electrical functions, a bad driving experience for vehicle users, and even safety hazards. Connector sealing technology is mature, and the handling of water ingress at the connector end is relatively simple, while wire damage in the wet area is more complicated. The system composed of wires, connectors, and equipment satisfies both the siphon effect and the capillary effect, so water ingress into the wiring harness and equipment due to wire damage occurs frequently.

[0003] Some anti-siphon structures use a breathable waterproof membrane on the connector to stabilize the air pressure of the equipment to block the siphon effect, but they cannot block the capillary effect formed by the small channels in the wires. The patent for anti-capillary effect wires uses a hydrophobic layer on the conductor to block the capillary effect, but it cannot prevent the siphon effect. Filling the gap between the conductor and the insulation with silicone can solve the above two problems, but there are problems such as complex wire production, high material cost, high equipment investment, and cumbersome subsequent wire stripping and crimping or welding processes.

[0004] The Chinese utility model patent with the announcement date of 2021.01.08 and the announcement number of CN 212323310 U provides a new anti-siphon connector, including a main body, a first rubber plug, a first tail cover, a first cable, an outer mold, a second rubber plug, a second tail cover and a second cable; a bracket is arranged in the main body, a metal terminal is arranged on the bracket, a first external thread is arranged at one end of the main body, a first internal thread is arranged in the first tail cover, the first internal thread is fixed with the first external thread, and the first rubber plug is arranged in the first tail cover; a second external thread is arranged at one end of the outer mold, a second internal thread is arranged in the second tail cover, the second internal thread is fixed with the second external thread, and the second rubber plug is arranged in the second tail cover; the first cable is connected to the metal terminal; the second cable is connected to the metal terminal; a colloid is injected into the gap position in the main body, and the other end of the outer mold is connected and fixed with the other end of the main body. The new anti-siphon connector can prevent siphoning by injecting colloid into the gap position in the main body. However, the wiring harness structure of this patent is complex, which is not only costly, but also has the problem of cumbersome subsequent wire stripping and crimping or welding processes. Summary of the invention

[0005] In view of the above technical problems, the utility model proposes an intermediate structure for anti-siphon and capillary effect of wire harness, which is used to solve the problem of complex structure of anti-siphon connector in the prior art.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] An intermediate structure for preventing siphon and capillary effects of a wiring harness, comprising an electric wire with a portion of the conductor exposed and a plastic shell sleeved on the outside of the electric wire, wherein the plastic shell is located on the outside of the insulating layer of the conductor and both ends of the conductor; sealant is injected into the plastic shell. The utility model can play a role of partitioning on the electric wire by stripping off a portion of the insulating layer of the electric wire to expose the conductor part, placing the conductor part in the plastic shell, and then filling the plastic shell with sealant, thereby preventing the siphon effect and capillary effect from occurring through the electric wire, and preventing water from entering the equipment end along the wiring harness; and the utility model has the advantages of simple structure, easy manufacture, good sealing performance, and can achieve automation and mass production.

[0008] Furthermore, the plastic shell is provided with a through hole through which the power supply line passes.

[0009] Furthermore, a sheath for sleeved on the outside of the electric wire is provided on the side surface of the plastic shell, and the sheath is arranged concentrically with the through hole.

[0010] Furthermore, a waterproof plug is provided in the sheath, and the waterproof plug is sleeved on the electric wire.

[0011] Furthermore, the waterproof plug is interference fit with the electric wire and / or the sheath.

[0012] Furthermore, the waterproof plug comprises a front end portion inserted into the through hole and a main body portion which is interference fit with the sheath, and an annular groove is provided on the outer periphery of the main body portion.

[0013] Furthermore, one side of the plastic shell is provided with two or more through holes for power supply lines to pass through.

[0014] Furthermore, the sheaths on two adjacent through holes on one side of the plastic shell are connected to form an "8"-shaped structure.

[0015] Furthermore, the plastic shell is a rectangular structure, the perforations are arranged on the side of the rectangular structure, and the bottom of the rectangular structure is closed and the top is open.

[0016] Furthermore, reinforcing ribs are provided in the plastic shell, and the reinforcing ribs are located between adjacent electric wires.

[0017] Beneficial effects of the utility model:

[0018] 1. The utility model can play a role of partition on the wire by stripping off part of the insulation layer of the wire to expose the conductor part, placing the conductor part in a plastic shell, and then filling the plastic shell with sealant, so as to prevent the siphon effect and capillary effect from occurring through the wire, and prevent water from entering the device end along the wire harness;

[0019] 2. The utility model provides a waterproof plug at the position where the wire enters the plastic shell, and the waterproof plug is interference fit with the wire and the plastic shell, which further plays the role of sealing and partitioning, and improves the effect of preventing siphon effect and capillary effect;

[0020] 3. The utility model has the advantages of simple structure, easy manufacture, low cost, good sealing performance, and can realize automation and batch production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the plastic shell structure of the utility model;

[0025] Figure 4 It is a cross-sectional structural schematic diagram of the utility model.

[0026] In the figure: 1. plastic shell, 101. sheath, 102. reinforcing ribs, 103. perforations, 2. wires, 201. conductors, 3. waterproof plugs, 4. sealants. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1~Figure 4As shown, an intermediate structure for anti-siphonage and capillary effect of a wiring harness described in Example 1 of the utility model includes an electric wire 2 and a plastic shell 1 sleeved on the outside of the electric wire 2. The electric wire 2 selects a position to strip off the insulation layer to expose a portion of the conductor 201. The plastic shell 1 is sleeved on the outside of the conductor 201 and the outside of the insulation layer at both ends of the conductor 201. After the intersection of the plastic shell 1 and the electric wire 2 is sealed, a sealant 4 is injected into the cavity of the plastic shell 1 to cover the exposed portion of the conductor 201 but not beyond the cavity of the plastic shell 1. The sealant 4 fully contacts and penetrates the plastic shell 1 and the conductor 201 to achieve the effect of sealing and isolation.

[0029] In addition, the insulating layer can be made of any one of polyvinyl chloride, polyethylene, silicone rubber, polypropylene, polyurethane-based thermoplastic elastomer, and cross-linked polyethylene or coach polyolefin. The conductor of the wire can be any one of aluminum conductor, aluminum alloy conductor, copper conductor or copper alloy conductor, and the conductor is a multi-strand twisted core wire. The plastic shell is one of PA66 and PBT. The sealant is one of epoxy resin and polyurethane single-component or two-component glue, preferably black.

[0030] Furthermore, if Figure 1 and Figure 3 As shown, the side surfaces of the plastic shell 1 are provided with through holes 103 through which the power supply wire 2 passes, so that the wire 2 can pass through from one side of the plastic shell 1 and pass through from the other side, so that the exposed conductor 201 is located in the middle of the plastic shell 1. In addition, the side surface of the plastic shell corresponding to the position of the through hole 103 is provided with a sheath 101 for sheathing the outside of the wire 2, and the sheath 101 is concentric with the through hole 103.

[0031] Embodiment 2 is different from Embodiment 1 in that Figure 1 and Figure 2 As shown, a waterproof plug 3 is provided in the sheath 101 , and the waterproof plug 3 is sleeved on the electric wire 2 .

[0032] Furthermore, if Figure 3 As shown, the waterproof plug 3 is interference fit with the wire 2 and / or the sheath 101 .

[0033] Specifically, Figure 2 and Figure 4 As shown, the waterproof plug 3 includes a front end inserted into the through hole 103 and a main body that is interference-fitted with the sheath 101, and an annular groove is provided on the outer periphery of the main body. The front end is completely in line with or interference-fitted with the through hole 103; the annular groove allows the main body to be slightly deformed when inserted into the sheath 101 and to recover to an interference fit with the sheath 101 after insertion. There is also an annular curved protrusion at the tail of the main body.

[0034] Embodiment 3 is different from Embodiment 2 in that Figure 1 and Figure 3 As shown, one side of the plastic shell 1 is provided with two or more through holes 103 through which the power supply wires 2 pass. Figure 3 As shown, the sheaths 101 on two adjacent through holes 103 on the same side of the plastic shell 1 are connected to form an "8"-shaped structure.

[0035] In this embodiment, two through holes 103 are respectively provided on both sides of the plastic shell 1 for the power supply line 2 to pass through. The sheaths 101 on the same side are connected to form an "8"-shaped structure.

[0036] Embodiment 4 is different from Embodiment 1 in that Figure 2 and Figure 4 As shown, the plastic shell 1 is a rectangular structure, and the through hole 103 is arranged on the side of the rectangular structure. The bottom of the rectangular structure is closed and the upper end is open, which is convenient for injecting sealant.

[0037] Furthermore, if Figure 1 and Figure 3 As shown, a reinforcing rib 102 is provided in the plastic shell 1 , and the reinforcing rib 102 is located between adjacent electric wires 2 .

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intermediate structure for anti-siphon and capillary effect of wiring harness, characterized in that: The invention comprises an electric wire (2) with a portion of the electric wire (201) exposed, and a plastic shell (1) sleeved on the outside of the electric wire (2), wherein the plastic shell (1) is located on the outside of the electric wire (201) and the insulating layer at both ends of the electric wire (201); a sealant (4) is injected into the plastic shell (1); a through hole (103) is provided on the plastic shell (1) for the power supply wire (2) to pass through; the plastic shell (1) is a rectangular structure, the through hole (103) is arranged on the side of the rectangular structure, the bottom of the rectangular structure is closed and the top is open; a reinforcing rib (102) is provided in the plastic shell (1), and the reinforcing rib (102) is located between adjacent electric wires (2).

2. The intermediate structure for wire harness anti-siphon and capillary effect according to claim 1, characterized in that: A sheath (101) for sheathing the outside of the electric wire (2) is provided on the side surface of the plastic shell, and the sheath (101) and the through hole (103) are arranged concentrically.

3. The intermediate structure for wire harness anti-siphon and capillary effect according to claim 2, characterized in that: A waterproof plug (3) is provided in the sheath (101), and the waterproof plug (3) is sleeved on the electric wire (2).

4. The intermediate structure for wire harness anti-siphon and capillary effect according to claim 3, characterized in that: The waterproof plug (3) is interference-fitted with the electric wire (2) and / or the sheath (101).

5. The intermediate structure for wire harness anti-siphon and capillary effect according to claim 3 or 4, characterized in that: The waterproof plug (3) comprises a front end portion inserted into the through hole (103) and a main body portion which is interference-fitted with the sheath (101), and an annular groove is provided on the outer periphery of the main body portion.

6. The intermediate structure for wire harness anti-siphon and capillary effect according to claim 3 or 4, characterized in that: One side of the plastic shell (1) is provided with two or more through holes (103) through which the power supply wires (2) pass.

7. The intermediate structure for wire harness anti-siphon and capillary effect according to claim 6, characterized in that: The sheaths (101) on two adjacent through holes (103) on one side of the plastic shell (1) are connected to form an "8"-shaped structure.

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