CN111431381B - Waterproof structure of wire harness and DCDC converter or charger comprising same - Google Patents
Waterproof structure of wire harness and DCDC converter or charger comprising same Download PDFInfo
- Publication number
- CN111431381B CN111431381B CN202010316471.9A CN202010316471A CN111431381B CN 111431381 B CN111431381 B CN 111431381B CN 202010316471 A CN202010316471 A CN 202010316471A CN 111431381 B CN111431381 B CN 111431381B
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- Prior art keywords
- sealing
- plug
- wire harness
- hole
- waterproof structure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Connector Housings Or Holding Contact Members (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The invention relates to a waterproof structure of a wire harness and a DCDC converter or charger comprising the same, and the waterproof structure comprises a sealing cover which is matched with a through hole which is formed in a shell and penetrates through the shell, wherein the sealing cover is connected with the shell in a sealing manner, the sealing cover is provided with a plurality of plug mounting holes, a sealing plug made of an elastic material is mounted in each plug mounting hole, the sealing plugs are connected with the plug mounting holes in a sealing manner, a threading hole for the wire harness to pass through is formed in each sealing plug, and the threading hole is connected with the wire harness in a sealing manner.
Description
Technical Field
The invention relates to a sealing waterproof structure, in particular to a waterproof structure of a wire harness and a DCDC converter or charger comprising the same.
Background
In the prior art, the methods for processing the water resistance of the wire harness, such as the water resistance between the fan wire harness and the DCDC converter or the charger aluminum shell, are roughly divided into three types:
the first method is as follows: accomplish the minimum with the size in hole on the aluminum hull, after the pencil penetrated the aluminum hull, sealed with sealed glue to reach waterproof requirement, this kind of treatment method is more traditional, and the efficiency of the sealed glue treatment method greatly reduced batch production of gluing directly, and sealed glue is handled improperly, influences the outward appearance.
The second method is as follows: the fan wiring harness with the insulating sheath penetrates into the rubber sleeve with the hole, then the rubber sleeve is plugged into the round hole in the aluminum shell, and the insulating sheath and the two wires are sealed by glue, so that the waterproof requirement is met.
And thirdly, soldering the two leads with the circular contact pins respectively by using soldering tin, placing the leads (with the insulating sheaths) with the contact pins together in an injection molding body (made of a material with certain resilience), wherein one half of the contact pins are arranged in the injection molding body, and the other half of the contact pins are used for being inserted in a circuit board in the aluminum shell to form a plug type structure SR, a plurality of annular bulges are arranged on the outer ring of the SR, and the bulges are in compression fit with the tapered hole of the aluminum shell so as to achieve a sealing effect.
Disclosure of Invention
The invention aims to provide a waterproof structure of a wire harness, which can solve the waterproof problem between the wire harness and the whole machine, can conveniently replace a component connected with the wire harness and is convenient to install, and a DCDC converter or a charger comprising the waterproof structure, and solves the problems of the existing wire harness waterproof structure.
In order to achieve the purpose, the invention adopts the following technical scheme: the waterproof structure of pencil including be used for with the casing on set up link up the inside and outside through-hole complex sealed lid of casing, sealing connection between sealed lid and the casing, sealed lid is equipped with a plurality of end cap mounting hole, installs the sealed end cap of making by elastic material in every end cap mounting hole, sealing connection between sealed end cap and the end cap mounting hole, be provided with the through wires hole that supplies the pencil to pass on the sealed end cap, sealing connection between through wires hole and the pencil. The sealing cover is made of metal material or plastic material capable of forming rigid support, and the sealing plug is made of elastic material such as silicon rubber which can be extruded or compressed. The sealing cover can play a role in keeping the framework, and can realize the support of the sealing plug and control the compression amount of the sealing plug, so that the good sealing effect on the wiring harness is realized, and the sealing problem between the wiring harness and the shell is solved. When the assembly connected with the wiring harness outside the shell is damaged and needs to be replaced, the wiring harness in the shell is separated from the component in the shell only by opening the sealing cover, the external assembly connected with the wiring harness can be detached, and then the external assembly, the speed limit and the sealing cover are made worse together, so that the whole replacement and installation operation are very convenient.
Preferably, the sealing cover comprises a body and a convex body integrally manufactured with the body, the convex body is matched with the through hole in the shell, a groove for accommodating the sealing ring is formed in the periphery of the body corresponding to the root of the convex body, and the sealing ring which can be matched with the outer wall of the shell is arranged in the groove. Wherein, the location of sealed lid on the casing can be realized with the through-hole cooperation on the casing to the convex body, and when sealed lid and casing assembly, the sealing washer is compressed tightly between sealed lid and casing outer wall in order to realize sealed between lid and the casing sealed.
Preferably, the upper edge of the groove is provided with a plurality of convex clips which are arranged at intervals and protrude inwards the groove, and the convex clips are clamped on the sealing ring. The convex card can block the sealing ring, and the sealing ring is prevented from slipping during assembly and replacement.
Preferably, the outer wall of the sealing plug is provided with a plurality of annular outer protrusions, and the outer diameter of each annular outer protrusion is larger than the inner diameter of the plug mounting hole. When the sealing plug is assembled with the plug mounting hole, the annular outer protrusion is extruded by the inner wall of the plug mounting hole to form sealing contact between the outer wall of the sealing plug and the inner wall of the plug mounting hole, and good sealing between the sealing plug and the sealing cover is guaranteed. The annular inner bulges greatly reduce the risk of air tightness loss caused by uncontrollable factors such as bending of the wire harness, sliding of the sealing plug, surface defects in the plug mounting hole of the sealing cover and the like while increasing the sealing pressure, and the air tightness reliability of the whole machine is improved.
Preferably, an annular inner protrusion is formed at a position, close to the end portion, of the plug mounting hole, and an annular groove matched with the annular inner protrusion is formed on the sealing plug. Interior protruding cooperation and annular groove cooperation play and prevent that sealed end cap from leading to sealed end cap to deviate from in the end cap mounting hole of sealed lid when the pull pencil, secondly avoid outside pencil when buckling, influence the sealed of inside sealed end cap.
Preferably, the inner end of the plug mounting hole is formed with a chamfered slope. The chamfer inclined plane has the function of reducing resistance when the sealing plug is assembled with the sealing cover, so that the non-sealing part of the sealing plug can slide out more easily.
Preferably, the outer end of the sealing plug is higher than the surface of the sealing cover, and the height of the surface of the sealing cover is gradually reduced from the outer edge of the sealing plug to the outside, so that when the wiring harness is bent, the damage and abrasion of the plastic sharp corner to the sealing plug are reduced, a space is reserved for the sealing plug, and the wiring harness is prevented from being excessively bent and damaged.
Preferably, the sealing cover is of a diamond structure, and two symmetrically arranged mounting holes are formed in the sealing cover body. Under the condition of ensuring the structural strength and sealing, the size of the whole sealing structure is greatly reduced, and the sealing structure is enough space of the whole machine.
Preferably, the number of the plug mounting holes is two, and the sealing cover is provided with two fan-shaped holes which are symmetrically arranged with the two plug mounting holes. Two mounting holes are selected for assembly, and the mounting device is more suitable for mounting in various occasions.
The DCDC converter or the charger with the waterproof structure comprises a shell, a PCB in the shell and a fan outside the shell, wherein the fan is connected with the PCB through a wire harness to obtain electricity, and the wire harness penetrates through a threading hole in a sealing plug.
The invention not only can solve the waterproof problem between the wire harness and the whole machine, but also has the advantages of convenient replacement of the component connected with the wire harness, convenient installation and the like.
Drawings
Fig. 1 is a sectional view of a wire harness waterproofing structure of the present invention;
FIG. 2 is an isometric view of the inner end of the waterproof construction of the wire harness of the present invention;
FIG. 3 is an isometric view of the outer end of the waterproof construction of the wire harness of the present invention;
FIG. 4 is a schematic view of a sealing plug according to the present invention;
fig. 5 is a schematic structural diagram of a DCDC converter or charger including the wire harness waterproofing structure of the present invention.
Detailed Description
The invention is further described below with reference to the figures and specific embodiments.
By figure 1, figure 2, figure 3, figure 4, the waterproof construction of pencil is including being used for with the casing on set up link up the inside and outside sealed lid 1 of through-hole complex of casing, sealed lid is made by nylon PA66+30% glass fiber material, sealing connection between sealed lid 1 and the casing, sealed lid 1 is the rhombus structure, sealed lid 1 includes body 5 and the convex body 6 of making with the body an organic whole, the convex body cooperates with the through-hole on the casing, body 5 is equipped with the recess 7 of holding the sealing washer corresponding to convex body root periphery, be provided with in the recess 7 can with casing outer wall complex sealing washer 8, the reason is equipped with 4 circumference interval distribution and the protruding boss 11 in the recess on the groove 7, boss 11 card is on sealing washer 8. The body 5 is provided with two symmetrically arranged mounting holes 9, the convex body 6 of the sealing cover is internally provided with 2 plug mounting holes 2, and the convex body 6 is provided with two fan-shaped holes 10 symmetrically arranged with the 2 plug mounting holes 2. A sealing plug 3 made of silicon rubber is installed in each plug installation hole 2, 3 annular outer protrusions 12 are arranged on the outer wall of each sealing plug 3, and the outer diameter of each annular outer protrusion 12 is larger than the inner diameter of each plug installation hole 2 to achieve sealing connection between each sealing plug 3 and each plug installation hole 2. An annular inner protrusion 13 is formed at the position, close to the outer end part, of the plug mounting hole 2, an annular groove 14 matched with the annular inner protrusion 13 is formed on the sealing plug 3, and a chamfer inclined plane 15 is formed at the inner end of the plug mounting hole 2. The outer end of the sealing plug 3 is higher than the surface of the sealing cover 1, and the height of the surface of the sealing cover 1 is gradually reduced outwards from the outer edge of the sealing plug. The sealed plug 3 is provided with a threading hole 4 for the wiring harness to pass through, and the threading hole 4 is connected with the wiring harness in a sealing way.
As shown in fig. 5, the wire harness waterproof structure is a DCDC converter or a charger, and includes a housing 16, a PCB 17 in the housing, and a fan 18 outside the housing, wherein the fan 18 is connected to the PCB 17 through a wire harness 19 to obtain electricity, the wire harness 19 passes through a threading hole on a sealing plug, and a screw 20 passes through a mounting hole on a sealing cover body to be in threaded fit with the housing to realize the mounting and fixing of the sealing cover.
Claims (7)
1. A waterproof structure of a wire harness, characterized in that: the wire harness sealing device comprises a sealing cover which is matched with a through hole which is formed in the shell and penetrates through the shell, the sealing cover is connected with the shell in a sealing mode, the sealing cover is provided with a plurality of plug mounting holes, a sealing plug made of elastic materials is mounted in each plug mounting hole, the sealing plugs are connected with the plug mounting holes in a sealing mode, a wire through hole for a wire harness to penetrate through is formed in each sealing plug, and the wire through hole is connected with the wire harness in a sealing mode; a plurality of annular outer bulges are arranged on the outer wall of the sealing plug, and the outer diameter of each annular outer bulge is larger than the inner diameter of the plug mounting hole; when the sealing plug is assembled with the plug mounting hole, the annular outer protrusion is extruded by the inner wall of the plug mounting hole, so that sealing contact is formed between the outer wall of the sealing plug and the inner wall of the plug mounting hole, and good sealing between the sealing plug and the sealing cover is ensured; an annular inner bulge is formed at the position, close to the end part, of the plug mounting hole, and an annular groove matched with the annular inner bulge is formed on the sealing plug; the sealing cover comprises a body and a convex body integrally manufactured with the body, the convex body is matched with a through hole in the shell, 2 plug mounting holes are formed in the convex body of the sealing cover, and two fan-shaped holes symmetrically arranged with the 2 plug mounting holes are formed in the convex body.
2. The waterproof structure of a wire harness according to claim 1, characterized in that: the body is provided with a groove corresponding to the periphery of the root of the convex body and used for accommodating a sealing ring, and the sealing ring which can be matched with the outer wall of the shell is arranged in the groove.
3. The waterproof structure of a wire harness according to claim 2, characterized in that: and a plurality of convex clips which are arranged at intervals and protrude inwards the groove are arranged on the upper edge of the groove, and the convex clips are clamped on the sealing ring.
4. The waterproof structure of the wire harness according to claim 1, 2, or 3, characterized in that: and a chamfer inclined plane is formed at the inner end of the plug mounting hole.
5. The waterproof structure of the wire harness according to claim 1, 2, or 3, characterized in that: the outer end of the sealing plug is higher than the surface of the sealing cover, and the height of the surface of the sealing cover is gradually reduced from the outer edge of the sealing plug to the outside.
6. The waterproof structure of the wire harness according to claim 1, 2, or 3, characterized in that: the sealing cover is of a diamond structure, and two mounting holes which are symmetrically arranged are formed in the sealing cover body.
7. A DCDC converter or charger of a waterproof structure containing the wire harness according to any one of claims 1 to 6, comprising a housing, a PCB board in the housing, and a fan outside the housing, wherein the fan is connected with the PCB board through the wire harness to get electricity, and the wire harness passes through a threading hole on a sealing plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010316471.9A CN111431381B (en) | 2020-04-21 | 2020-04-21 | Waterproof structure of wire harness and DCDC converter or charger comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010316471.9A CN111431381B (en) | 2020-04-21 | 2020-04-21 | Waterproof structure of wire harness and DCDC converter or charger comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111431381A CN111431381A (en) | 2020-07-17 |
| CN111431381B true CN111431381B (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010316471.9A Active CN111431381B (en) | 2020-04-21 | 2020-04-21 | Waterproof structure of wire harness and DCDC converter or charger comprising same |
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| Country | Link |
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| CN (1) | CN111431381B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206712580U (en) * | 2017-05-10 | 2017-12-05 | 青岛晟润泰电气制造有限公司 | A kind of water-proof fan |
| CN208336638U (en) * | 2018-06-21 | 2019-01-04 | 杭州伯坦科技工程有限公司 | A kind of electric automobile high-voltage wire harness wiring position waterproof cover |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2914438Y (en) * | 2006-04-14 | 2007-06-20 | 中国重型汽车集团有限公司 | Water-proof plug for car body |
| CN201331037Y (en) * | 2008-12-31 | 2009-10-21 | 广州市鸿利光电子有限公司 | Waterproof led lamp remote control receiver |
| JP5824210B2 (en) * | 2010-12-16 | 2015-11-25 | 矢崎総業株式会社 | Liquid-proof structure of wire harness |
| CN204068182U (en) * | 2014-09-03 | 2014-12-31 | 上海柏宜照明电子有限公司 | A kind of Waterproof connector of cable |
| CN206259660U (en) * | 2016-10-20 | 2017-06-16 | 广西久久星新能源车辆科技有限公司 | A kind of electric automobile converter wire harness water-proof structure |
| CN208272245U (en) * | 2018-04-18 | 2018-12-21 | 广东林积为实业投资有限公司 | A kind of waterproof construction of adapter |
| CN110739567A (en) * | 2019-10-14 | 2020-01-31 | 杭州铁城信息科技有限公司 | cable connector and DC-DC converter containing the same |
-
2020
- 2020-04-21 CN CN202010316471.9A patent/CN111431381B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206712580U (en) * | 2017-05-10 | 2017-12-05 | 青岛晟润泰电气制造有限公司 | A kind of water-proof fan |
| CN208336638U (en) * | 2018-06-21 | 2019-01-04 | 杭州伯坦科技工程有限公司 | A kind of electric automobile high-voltage wire harness wiring position waterproof cover |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111431381A (en) | 2020-07-17 |
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Address after: 310015 Room 501, building 1, 108 Xiangyuan Road, Gongshu District, Hangzhou City, Zhejiang Province Applicant after: Tiecheng Information Technology Co.,Ltd. Address before: 310015 Room 501, building 1, 108 Xiangyuan Road, Gongshu District, Hangzhou City, Zhejiang Province Applicant before: HANGZHOU TIECHENG INFORMATION TECHNOLOGY Co.,Ltd. |
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