Horn mouth type wire outlet structure capable of automatically leveling glue

Abstract

The utility model provides a horn mouth type glue automatic leveling wire outlet structure, which comprises a base body, the base body is provided with a wire outlet hole for a wire harness to pass through, the wire outlet hole comprises a positioning hole part arranged on the bottom surface of the base body and a glue injection hole part arranged on the top surface of the base body, the glue injection hole part is of a conical hole structure with a large port facing upwards, and the glue injection hole part is of a horn mouth structure. A small port of the positioning hole part intersects with an upper port of the positioning hole part, and the aperture of the positioning hole part corresponds to the diameter of a wire harness. According to the utility model, the wire outlet hole of the base body comprises the positioning hole part and the conical glue injection hole part, the positioning hole part is used for positioning the position of the wire harness, the horn mouth glue injection space is formed between the hole wall of the conical hole part and the wire harness, and the sealant can automatically level and fill the space by virtue of self gravity after being injected, so that the sealant injection amount is less, the cost is saved, and the curing time is short; and the wire harness is firmly fixed in the wire outlet hole, so that the sealing effect of the sealant on the wire outlet hole is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire harness glue injection and fixation, in particular to a trumpet-shaped wire outlet structure with automatic glue leveling. Background Art

[0002] Currently, in the lighting and instrumentation structures of two- or three-wheeled electric vehicles, the base, i.e., the light housing and instrument housing, is provided with a circular barrel-shaped wire outlet for the wiring harness to pass through. After the wiring harness passes through, an annular glue injection space is left between the barrel and the wiring harness. Sealant is injected into this annular glue injection space in an amount sufficient to fill the space. The sealant then cures to seal the wire outlet hole, secure the wiring harness, and prevent dust and moisture from entering the light. Because the wire outlet hole is a circular barrel-shaped hole, there are problems such as large glue application, high cost, long curing time, easy air entrapment, poor sealing effect, and subsequent risk of water leakage. Utility Model Content

[0003] In view of this, the utility model aims to propose a bell-mouth type wire outlet structure with automatic glue leveling to save costs and ensure the sealing effect of the wire outlet hole.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A bell-shaped wire outlet structure with automatic glue leveling includes a base body, wherein the base body is provided with a wire outlet hole for threading a wire harness, the wire outlet hole including a positioning hole portion provided on the bottom surface of the base body and a glue injection hole portion provided on the top surface. The glue injection hole portion is a conical hole structure with a large end facing upward, and its small end intersects with an upper end of the positioning hole portion. The aperture of the positioning hole portion corresponds to the diameter of the wire harness.

[0006] Furthermore, the top angle of the glue injection hole is 70° to 90°.

[0007] Furthermore, the hole height of the glue injection hole is ≥3mm.

[0008] Furthermore, the positioning hole is a conical hole with a larger upper end and a smaller lower end, and the corresponding vertex angle is 0.4 to 2 degrees, and a total fitting clearance of 0.1 to 0.2 mm is left between the lower end and the wiring harness.

[0009] Furthermore, an annular groove is provided on the bottom surface of the base body around the positioning hole.

[0010] Furthermore, the substrate is an injection molded part.

[0011] Compared with the prior art, the bell-shaped automatic glue leveling outlet structure described in the present invention has the following advantages:

[0012] (1) In the present invention, the wire outlet hole of the base includes a positioning hole portion and a conical glue injection hole portion. The positioning hole portion roughly positions the wire harness to make it vertical. A trumpet-shaped glue injection space is formed between the hole wall of the conical hole portion and the wire harness. The wire outlet structure enables the sealant to automatically flow and fill the space by its own gravity after being injected into the trumpet-shaped glue injection space, and no air entrapment occurs. At the same time, the amount of glue applied is small, cost is saved, the curing time is short, the wire harness is firmly fixed, and the sealing effect of the wire outlet hole is good.

[0013] (2) In the present invention, the base is an injection molded part, and the wire outlet hole structure is simple. The positioning hole portion of the wire outlet hole adopts a tapered hole structure with a top angle of 0.4 to 2 degrees, which is convenient for demolding. A matching gap is left between the lower port and the wiring harness to prevent the subsequent injection shrinkage from causing the wiring harness to be unable to be assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of a bell-shaped automatic glue leveling outlet according to this embodiment;

[0016] Figure 2 This is a schematic diagram of a wire harness structure with a trumpet-shaped automatic glue-leveling outlet structure described in this embodiment.

[0017] Description of reference numerals:

[0018] 1-base; 11-glue injection hole; 12-positioning hole; 14-annular groove; 15-bell mouth glue injection space; 2-wiring harness. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0020] like Figure 1As shown, a bell-mouth type automatic glue leveling outlet structure includes a base 1, which is an injection molded part and has an outlet hole for threading a wiring harness. The outlet hole includes a glue injection hole portion 11 and a positioning hole portion 12 arranged adjacent to each other, wherein the glue injection hole portion 11 is opened on the top surface of the base 1 and is a conical hole structure with the large end facing upward and the small end facing downward, forming a bell-mouth structure with the opening facing outward; the positioning hole portion 12 is located below the glue injection hole portion 11 and is opened on the bottom surface of the base 1, and the upper end of the positioning hole portion 12 and the small end of the glue injection hole portion 11 intersect, that is, the upper end of the positioning hole portion 12 is the small end of the glue injection hole portion 11. The aperture size of the positioning hole portion 12 is determined according to the diameter of the threaded wiring harness. The aperture is slightly larger than the diameter of the corresponding wiring harness, so that a certain matching gap is left between the positioning hole portion 12 and the corresponding wiring harness to prevent the phenomenon that the base injection molding shrinks and deforms, resulting in the inability to assemble the wiring harness. For example, when the diameter of the wire harness is φ3.6 mm, the size of the positioning hole portion 12 is reserved at φ3.8 mm, so that a total fitting clearance of 0.2 mm is left between the wire harness and the base body to solve the problem of the base body being unable to be assembled due to shrinkage during injection molding.

[0021] like Figure 2 As shown, the wiring harness 2 passes through the wire outlet hole of the base body, and the positioning hole portion 12 roughly positions the wiring harness 2 to facilitate the subsequent verticalization of the wiring harness 2. At this time, the wiring harness 2 and the hole wall of the conical hole portion 11 form a trumpet-shaped glue injection space 15, and sealant is injected into the trumpet-shaped glue injection space 15 from its edge. Under the action of its own gravity, the sealant automatically levels in the trumpet-shaped glue injection space 15, fills the space, and then solidifies to fix the wiring harness 2 and seal the wire outlet hole to achieve the purpose of waterproofing. Since only a small amount of glue needs to be applied from the edge in this process, the glue can be automatically leveled by gravity, thus saving costs.

[0022] In the present invention, the vertex angle corresponding to the glue injection hole 11 is 70° to 90°, that is, the angle between the busbar and the axis of the glue injection hole 11 is 35° to 45°. The hole height of the glue injection hole 11 is ≥3mm, that is, at the position of the glue injection hole 11, the vertical height of the matching part of the wiring harness and the base is ≥3mm, so that there is a larger matching area between the wiring harness and the base, so as to stably connect the wiring harness and the base after glue injection. For example, for a wiring harness of φ3.6mm, the hole height of the glue injection hole 11 is set to 4mm, and the vertical height of the matching part of the wiring harness and the base at this position reaches 4mm, increasing the matching area. The wiring harness is arranged perpendicular to the base 1, which is convenient for glueing from the large port of the glue injection hole 11 to the bell-mouth glue injection space 15. The glue height is 4mm, which improves the firmness of the wiring harness fixation and improves the sealing effect of the wire outlet hole.

[0023] In the present invention, the positioning hole portion 12 is preferably a conical hole with a larger upper end and a smaller lower end, and a corresponding vertex angle of 0.4 to 2 degrees. The size of the lower end must ensure that a total fitting clearance of 0.1-0.2 mm can be left between the wiring harness. The positioning hole portion 12 adopts a conical hole structure with an upper end diameter larger than a lower end diameter, which facilitates the demolding operation of the base plastic part and prevents the injection mold from being strained during demolding.

[0024] In the present invention, an annular groove 14 is provided on the bottom surface of the base 1 around the positioning hole 12. Since the base 1 is an injection molded part, the base is rounded to facilitate the subsequent mold and injection molding process.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bell-shaped automatic glue leveling outlet structure, characterized by: The invention comprises a base body (1), wherein the base body (1) is provided with a wire outlet hole for passing a wiring harness, wherein the wire outlet hole comprises a positioning hole portion (12) provided on the bottom surface of the base body (1) and a glue injection hole portion (11) provided on the top surface, wherein the glue injection hole portion (11) is a conical hole structure with a large end facing upward, and a small end thereof intersects with an upper end of the positioning hole portion (12), and the aperture of the positioning hole portion (12) corresponds to the diameter of the wiring harness.

2. The bell-shaped automatic glue-leveling outlet structure according to claim 1, characterized in that: The vertex angle corresponding to the glue injection hole (11) is 70-90°.

3. The bell-shaped automatic glue-leveling outlet structure according to claim 1, characterized in that: The hole height of the glue injection hole (11) is ≥3 mm.

4. The bell-shaped automatic glue-leveling outlet structure according to claim 1, characterized in that: The positioning hole portion (12) is a conical hole with a larger upper end and a smaller lower end, and the corresponding vertex angle is 0.4-2 degrees, and a total fitting clearance of 0.1-0.2 mm is left between the lower end and the wiring harness.

5. The bell-shaped automatic glue-leveling outlet structure according to claim 1, characterized in that: The bottom surface of the base body (1) is provided with an annular groove (14) around the positioning hole portion (12).

6. The bell-shaped automatic glue-leveling outlet structure according to claim 1, characterized in that: The base (1) is an injection molded part.

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