Waterproof structure for wire harness to penetrate through shell

Abstract

The utility model provides a waterproof structure for a wire harness to penetrate through a shell, which comprises the shell and the wire harness arranged on the shell in a penetrating manner, a sealing ring is arranged between the wire harness and the shell, and an extrusion structure for pressing the sealing ring is arranged between the shell and the wire harness. According to the utility model, the sealing ring plays a preliminary sealing and waterproof role, and then the sealing ring is extruded by the extrusion structure, so that the sealing effect and the waterproof grade are greatly improved; moreover, the device occupies a limited structural space, and is convenient to use in small-size equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of wire harnesses, in particular to a waterproof structure for a wire harness to pass through a shell. Background Art

[0002] In recent years, with the further development of industrialization, sensors have been widely used in various industries, and different use environments have put forward higher requirements for sensors. In waterproof sensors that require output lines, it is difficult to waterproof the output line position. Conventional waterproof connectors are large in size and are not suitable for use in small sensors. Although the notch embedding method is convenient for disassembly, it is difficult to increase the waterproof level and is greatly affected by the process, and the sealing is unstable. When a high level of waterproofing is required, sealants are often used to fix the connection between the wiring harness and the housing, which looks ugly and is difficult to disassemble during repair.

[0003] The invention patent application with the publication date of 2019-11-08 and the publication number of CN110429424A discloses a vehicle light wiring harness. The sealed vehicle light wiring harness includes a cable and a housing connected to the cable. The front end of the housing is provided with an inner cavity, and the inner cavity is provided with connection holes that penetrate the front and rear end surfaces of the housing. The cable passes through the front end of the housing, the connection hole in the inner cavity, and the rear end of the housing in sequence; the inner cavity is filled with sealant to fix the cable to the housing and seal the connection hole. The housing isolates the front and rear ends of the housing through the sealant. However, this invention application cannot play a waterproof role. Summary of the invention

[0004] In view of the above-mentioned technical problems, the utility model proposes a waterproof structure for a wiring harness passing through a shell, which is used to solve the problem in the prior art that it is difficult to waterproof the outlet position of the wiring harness passing through the shell; the utility model has the characteristics of high waterproof grade, reliable structure, good stability, convenient assembly, good processability, and convenience for mass production, and can be widely used in sensors and similar equipment that have waterproof requirements and require output lines.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A waterproof structure for a wire harness passing through a housing comprises a housing, a wire harness passing through the housing, a sealing ring between the wire harness and the housing, and an extrusion structure for pressing the sealing ring between the housing and the wire harness. The utility model plays a preliminary sealing and waterproofing role through the sealing ring, and then the extrusion structure squeezes the sealing ring, so that the sealing effect and the waterproof level are greatly improved; the utility model occupies a limited structural space and is convenient for use in small-volume equipment.

[0007] Furthermore, in order to enhance the squeezing effect of the wire harness on the sealing ring, the squeezing structure includes a wire harness rubber-wrapped block sleeved on the wire harness body for pressing the sealing ring onto the housing.

[0008] Furthermore, in order to facilitate the installation of the wiring harness rubber-coated block, a wiring harness rubber-coated block installation groove that fits with the wiring harness rubber-coated block is provided on the shell.

[0009] Furthermore, in order to enhance the squeezing effect of one side of the shell on the sealing ring, the shell is provided with a harness through hole for the wiring harness to pass through, and one end of the harness through hole facing the harness rubber block is provided with an extrusion part for cooperating with the harness rubber block to squeeze the sealing ring.

[0010] Furthermore, in order to achieve the effect of squeezing the sealing ring and simplify the structure at the same time, the squeezing portion is a sealing ring squeezing surface which is arranged in the wiring harness through hole and is interference fit with the sealing ring.

[0011] Furthermore, in order to not only play the role of squeezing the sealing ring but also accommodate the limiting sealing ring, the sealing ring squeezing surface is a conical surface.

[0012] Furthermore, in order to facilitate the disassembly and assembly of the wire harness rubber-coated block and the stable connection, the wire harness rubber-coated block can be detachably connected in the wire harness rubber-coated block installation groove.

[0013] Furthermore, in order to simplify the assembly and disassembly structure of the wire harness rubber-coated block, the wire harness rubber-coated block is connected to the wire harness rubber-coated block installation groove by means of fixing screws.

[0014] Furthermore, in order to facilitate the production of the wiring harness rubber-coated block and the fabrication of the wiring harness rubber-coated block installation groove, the wiring harness rubber-coated block is a rectangular plate structure.

[0015] Furthermore, in order to improve the sealing and waterproof effect of the sealing ring and facilitate the improvement of the extrusion effect of the extrusion structure on the sealing ring, the sealing ring is an O-ring.

[0016] Beneficial effects of the utility model:

[0017] 1. The sealing ring extrusion surface and the wiring harness rubber block of the utility model are extruded in the axial and radial directions of the wiring harness and the wiring harness through hole, so that the sealing effect and the waterproof level are greatly improved;

[0018] 2. The wiring harness of the utility model is tightly connected to the housing by fixing screws, which can effectively prevent the wiring harness from moving when it is pulled by external force, ensuring that it still has a waterproof function under the condition of being pulled;

[0019] 3. When the equipment fails and needs to be repaired, the wiring harness can be disassembled by simply removing the fixing screws, which is convenient for subsequent product maintenance;

[0020] 4. The utility model has the characteristics of high waterproof grade, reliable structure, good stability, convenient assembly, good processability, and convenient mass production. It can be widely used in sensors and similar equipment that have waterproof requirements and need output lines;

[0021] 5. The utility model occupies limited structural space and is easy to use in small-volume equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0025] Figure 3 It is a partial structural schematic diagram of the housing of the utility model;

[0026] Figure 4 It is a schematic diagram of the structure of the wiring harness of the utility model.

[0027] In the figure: 1. shell, 11. wiring harness through hole, 12. wiring harness rubber block mounting groove, 13. sealing ring extrusion surface, 14. fixing screw mounting hole, 2. wiring harness, 21. wiring harness body, 22. wiring harness rubber block, 23. sealing ring extrusion surface of rubber block, 24. wiring harness fixing screw through hole, 3. sealing ring, 4. fixing screw. DETAILED DESCRIPTION

[0028] 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.

[0029] like Figure 1 and Figure 2As shown, a waterproof structure for a wiring harness passing through a shell described in Example 1 of the utility model includes a shell 1 and a wiring harness 2 inserted into the shell 1, the shell 1 is provided with a wiring harness through hole 11 for the wiring harness 2 to pass through, a sealing ring is provided between the wiring harness 2 and the shell, the sealing ring is sleeved on the wiring harness 2, and the sealing ring is located at the end of the wiring harness through hole 11 close to the shell 1, and an extrusion structure for pressing the sealing ring is provided between the shell 1 and the wiring harness 2.

[0030] Specifically, Figure 4 As shown, the extrusion structure includes a wire harness rubber-coated block 22 sleeved on the wire harness body 21 . After the wire harness 2 is installed on the housing 1 , the wire harness rubber-coated block 22 can press the sealing ring onto the housing 1 .

[0031] Furthermore, if Figure 3 As shown, the housing 1 is provided with a wiring harness rubber block installation groove 12 that fits with the wiring harness rubber block 22. After the wiring harness 2 is installed on the housing 1, the wiring harness rubber block 22 can be embedded in the rubber block installation groove 12. The wiring harness rubber block 22 squeezes the sealing ring in the axial direction.

[0032] Embodiment 2 differs from Embodiment 1 in that an end of the wiring harness through hole 11 facing the wiring harness rubber-coated block 22 is provided with an extrusion portion for cooperating with the wiring harness rubber-coated block 22 to extrude a sealing ring.

[0033] Furthermore, the extrusion portion is a sealing ring extrusion surface 13 which is arranged in the wiring harness through hole 11 and has an interference fit with the sealing ring. Figure 3 As shown, the sealing ring extrusion surface 13 is a conical surface, the large end of the conical surface faces outward, and the small end is connected to the harness through hole 11. Not only can the sealing ring be installed in the conical surface at the end of the harness through hole 11, but the conical surface also extrudes the sealing ring in the radial direction, so that the sealing effect and waterproof level are greatly improved.

[0034] Embodiment 3 is different from Embodiment 2 in that Figure 1 and Figure 4 As shown, the wiring harness rubber-coated block 22 is a rectangular plate structure. Correspondingly, the wiring harness rubber-coated block installation groove 12 is also a rectangular groove. The side of the wiring harness rubber-coated block 22 that matches the bottom of the rectangular groove is the rubber-coated block sealing ring extrusion surface 23.

[0035] Embodiment 4 is different from Embodiment 3 in that the wiring harness rubber-coated block 22 is detachably connected to the wiring harness rubber-coated block installation groove 12 .

[0036] Furthermore, if Figure 1 and Figure 2 As shown, the wiring harness rubber-coated block 22 is connected to the wiring harness rubber-coated block installation groove 12 by means of fixing screws 4. Figure 3 and Figure 4As shown, a fixing screw mounting hole 14 is provided at the bottom of the wiring harness rubber coated block mounting groove 12, and a corresponding wiring harness fixing screw through hole 24 is provided on the wiring harness rubber coated block 22 for inserting the fixing screw 4, and the fixing screw 4 is screwed into the fixing screw mounting hole 14 to install and fix the wiring harness rubber coated block 22.

[0037] Embodiment 5 is different from Embodiment 1 in that the sealing ring is an O-ring 3 .

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that any modification to the technical solutions described in the aforementioned embodiments, or any equivalent replacement of some or all of the technical features therein, within the spirit and principles of the present invention, and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A waterproof structure for a wiring harness passing through a housing, characterized in that: The invention comprises a housing (1), a wiring harness (2) passed through the housing (1), a sealing ring provided between the wiring harness (2) and the housing, and an extrusion structure for pressing the sealing ring between the housing (1) and the wiring harness (2); the extrusion structure comprises a wiring harness rubber block (22) sleeved on the wiring harness body (21) for pressing the sealing ring onto the housing (1); the housing (1) is provided with a wiring harness through hole (11) for the wiring harness (2) to pass through, and an extrusion portion for cooperating with the wiring harness rubber block (22) for extruding the sealing ring is provided at one end of the wiring harness through hole (11) facing the wiring harness rubber block (22); the extrusion portion is a sealing ring extrusion surface (13) provided in the wiring harness through hole (11) and having an interference fit with the sealing ring.

2. The waterproof structure for a wire harness passing through a housing according to claim 1, characterized in that: The housing (1) is provided with a wiring harness rubber-coated block installation groove (12) which fits with the wiring harness rubber-coated block (22).

3. The waterproof structure for a wire harness passing through a housing according to claim 2, characterized in that: The sealing ring extrusion surface (13) is a conical surface.

4. The waterproof structure for a wire harness passing through a housing according to any one of claims 1 to 3, characterized in that: The wire harness rubber-coated block (22) is detachably connected in the wire harness rubber-coated block installation groove (12).

5. The waterproof structure for a wire harness passing through a housing according to claim 4, characterized in that: The wire harness rubber-coated block (22) is connected to the wire harness rubber-coated block installation groove (12) via a fixing screw (4).

6. The waterproof structure for a wire harness passing through a housing according to any one of claims 1 to 3 or 5, characterized in that: The wiring harness rubber coating block (22) is a rectangular plate structure.

7. The waterproof structure for a wire harness passing through a housing according to any one of claims 1 to 3 or 5, characterized in that: The sealing ring is an O-type sealing ring (3).

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