WO2020207428A1 - 一种穿缸线束密封结构 - Google Patents

一种穿缸线束密封结构 Download PDF

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Publication number
WO2020207428A1
WO2020207428A1 PCT/CN2020/083921 CN2020083921W WO2020207428A1 WO 2020207428 A1 WO2020207428 A1 WO 2020207428A1 CN 2020083921 W CN2020083921 W CN 2020083921W WO 2020207428 A1 WO2020207428 A1 WO 2020207428A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
wiring
harness
sealing structure
sealing member
Prior art date
Application number
PCT/CN2020/083921
Other languages
English (en)
French (fr)
Inventor
张扬
张�林
张金伟
王艳
Original Assignee
绵阳富临精工机械股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 绵阳富临精工机械股份有限公司 filed Critical 绵阳富临精工机械股份有限公司
Priority to EP20787940.4A priority Critical patent/EP3955404A4/en
Publication of WO2020207428A1 publication Critical patent/WO2020207428A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/08—Safety, indicating or supervising devices
    • F02B77/085—Safety, indicating or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel
    • 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
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/06—Hermetically-sealed casings
    • H05K5/069—Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/021—Soldered or welded connections between two or more cables or wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • H01R43/24—Assembling by moulding on contact members
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings

Definitions

  • the invention relates to the field of sealing design of a through-cylinder wiring harness, in particular to a sealing structure of a through-cylinder wiring harness applied to an engine cylinder.
  • the sealing design of the through-cylinder wiring harness for example, the sealing design of the through-cylinder wiring harness between the sensor or controller installed in the engine cylinder and the central controller located outside the engine cylinder, where the through-cylinder wiring harness needs to pass through the crankshaft Box or cylinder block, therefore, the connection between the wiring harness located in the engine cylinder block (ie "in-cylinder wiring harness”) and the corresponding wiring harness located outside the engine cylinder (ie, the "out-cylinder wiring harness”) is connected at the engine block connection part There is a sealing problem.
  • the existing sealing design of the cylinder threading harness is usually directly connected with the wiring harness inside the cylinder (or understood as a wiring harness), and the sealing is performed by integral injection molding of the cylinder threader and the wiring harness.
  • the cylinder piercer and the harness rubber are of different materials, when the engine is running at high temperature and low temperature alternately, the sealing problem between the harness rubber and the cylinder piercer is likely to occur; in addition, because the conductors in the harness are generally multi-stranded Therefore, the oil in the engine cylinder may rise along the multi-strand cable lines or between the multi-strand cable lines due to capillary action, and there will also be a problem of insufficient sealing.
  • the technical problem to be solved by the present invention is to provide a sealing structure for a cylinder threading harness to improve the sealing performance between the cylinder threading harness and the cylinder body in view of the problems existing in the prior art.
  • a cylinder-through wiring harness sealing structure including a cylinder-in-cylinder wiring harness, a cylinder-through device, a cylinder block, a wiring sleeve, and an outer-cylinder wiring harness and an inner sealing member.
  • the wiring harness and the outer wiring harness of the cylinder form a conductive connection with the wiring sleeve respectively.
  • the wiring sleeve is installed in the positioning inner hole on the inner sealing member, and a sealed connection is formed between the wiring sleeve and the inner sealing member.
  • the inner sealing member is installed A sealed connection is formed between the inner sealing member and the cylinder in the inner hole of the cylinder piercer on the cylinder piercer, and a sealed connection is formed between the cylinder piercer and the cylinder body.
  • a positioning groove is provided on the cylinder piercer, a sealing ring is installed in the positioning groove, and a contact sealing structure is formed between the sealing ring and the cylinder.
  • one end of the cylinder piercing device forms a limiting shoulder, and a contact sealing structure is formed between the limiting shoulder and the cylinder.
  • the inner hole of the cylinder piercer on the cylinder piercer is a conical structure hole
  • one end of the inner sealing member forms a guide portion with a conical structure
  • the guide part and the inner hole of the cylinder piercer are formed between Contact sealing structure.
  • a blind hole is provided on the wiring sleeve, and one end of the inner-cylinder wiring harness and/or one end of the outer-cylinder wiring harness is inserted into the blind hole on the wiring sleeve.
  • the positioning inner hole on the inner sealing member is a stepped structure hole
  • the wiring sleeve is a stepped shaft structure
  • an embedded sealing structure is formed between the wiring sleeve and the inner sealing member.
  • a protective shell is further included, and the protective shell forms a sealed structure with the cylinder piercer and the cylinder body.
  • the protective shell forms a sealed structure with the cylinder piercer and the cylinder body by injection molding.
  • the present invention has the beneficial effects of forming a sealed connection between the wiring sleeve and the inner sealing member, forming a sealed connection between the inner sealing member and the cylinder, and forming a seal between the cylinder and the cylinder.
  • Connection which can form a triple seal structure, and the wiring sleeve can effectively block the fluid medium from penetrating between the in-cylinder wiring harness and the outer-cylinder wiring harness to cause leakage, which can greatly improve the penetration of the cylinder wiring harness and the cylinder body
  • the sealing performance is easy to implement, and the implementation cost is also low.
  • Fig. 1 is a longitudinal sectional perspective view of a sealing structure for a through-cylinder wire harness (including a protective shell) of the present invention.
  • Fig. 2 is a longitudinal sectional perspective view of a sealing structure of a through-cylinder wire harness according to the present invention (without a protective shell).
  • Fig. 3 is a cross-sectional view of the connection assembly between the inner-cylinder wiring harness, the outer-cylinder wiring harness and the wiring sleeve in Fig. 1 or Fig. 2.
  • Fig. 4 is a cross-sectional view of the cylinder threader in Fig. 1 or Fig. 2.
  • Fig. 5 is a cross-sectional view of the inner sealing member in Fig. 1 or Fig. 2.
  • the cylinder piercer 3 is formed with a cylinder piercer inner hole 32
  • the cylinder body 5 is provided with an installation inner hole for fixing the cylinder piercer 3
  • the inner sealing member 8 is formed with a positioning inner hole 81.
  • the inner-cylinder wiring harness 2 and the outer-cylinder wiring harness 7 respectively form a conductive connection with the wiring sleeve 6.
  • the wiring sleeve 6 is installed in the positioning inner hole 81 on the inner sealing member 8, and the wiring sleeve 6 and the inner sealing member 8 A sealed connection is formed between them; usually, the wiring sleeve 6 makes the positioning inner hole 81 on the inner sealing member 8 in a compressed state.
  • the positioning inner hole 81 on the inner sealing member 8 preferably adopts a stepped structure hole
  • the wiring sleeve 6 preferably adopts a stepped shaft structure
  • the wiring sleeve 6 and the inner sealing member 8 An embedded sealing structure is formed between the wiring sleeve 6 and the inner sealing member 8 to axially orient the wiring sleeve 6 during the assembly process, and to better limit the axial positioning position of the wiring sleeve 6 in the inner sealing member 8 .
  • the inner sealing member 8 is installed in the inner hole 32 of the cylinder piercer 3, and a sealed connection is formed between the inner sealing member 8 and the cylinder piercer 3; usually, the inner sealing member 8 is It is installed in the cylinder bore 32 on the cylinder borer 3 in a press-fit manner.
  • the cylinder piercer inner hole 32 on the cylinder piercer 3 is tapered.
  • one end of the inner sealing member 8 forms a guide portion 82 with a tapered structure, and a contact sealing structure is formed between the guide portion 82 and the inner hole 32 of the cylinder borer.
  • the protective shell 1 forms a sealed structure with the cylinder piercer 3 and the cylinder body 5; usually, the protective housing 1 is made of a plastic material with a certain elasticity, and is combined with the cylinder piercer 3 and the cylinder body 5 through injection molding. A sealing structure is formed, and the joint between the protective shell 1 and the cylinder piercer 3 is located on one side of the cylinder 5.
  • the in-cylinder wiring harness 2 and the outer-cylinder wiring harness 7 can be kept fixed and stationary with respect to the wiring sleeve 6, respectively, to ensure that the inner-cylinder wiring harness 2 and the outer-cylinder wiring harness 7 are maintained at a given position respectively to avoid electrical connections. Damage, such as damage caused by fatigue of the wire, or damage caused by vibration or incorrect handling.
  • a sealed connection is formed between the cylinder piercer 3 and the cylinder 5.
  • the cylinder piercer 3 is positioned and installed in the installation inner hole on the cylinder body 5, in order to facilitate the positioning of the cylinder piercer 3 and improve the sealing performance between the cylinder piercer 3 and the cylinder body 5, as shown in the figure
  • a positioning groove 31 can be provided on the cylinder piercer 3
  • a sealing ring 4 is installed in the positioning groove 31, and a contact sealing structure is formed between the sealing ring 4 and the cylinder 5;
  • a limiting shoulder 33 is formed at one end of the cylinder piercing device 3, and a contact sealing structure is formed between the limiting shoulder 33 and the cylinder 5.
  • the sealing ring 4 can provide good sealing robustness, especially during the cold start process to ensure reliable sealing, and even the wires of the inner and outer wiring harnesses 7
  • the outer skin is pierced, for example, during the injection molding process of the protective shell 1 or during the use of the engine block, the sealing reliability of the inner-cylinder wiring harness 2 and the outer-cylinder wiring harness 7 can also be ensured.
  • a sealed connection is formed between the wiring sleeve 6 and the inner sealing member 8, a sealed connection between the inner sealing member 8 and the cylinder piercer 3, and a sealed connection between the cylinder piercer 3 and the cylinder 5 can be formed.
  • Triple seal structure, the wiring sleeve 6 can also effectively block the fluid medium from penetrating between the in-cylinder wiring harness 2 and the outer-cylinder wiring harness 7 to cause leakage, which can greatly improve the gap between the through-cylinder wiring harness and the cylinder body 5. Sealing performance, and easy to implement, and the implementation cost is also low.
  • the two ends of the wiring sleeve 6 preferably have blind holes, and the depth of the blind holes is usually 10 mm.
  • One end of the inner-cylinder wiring harness 2 and one end of the outer-cylinder wiring harness 7 can be inserted into the blind holes on the wiring sleeve 6, and then connected and fixed by riveting or welding to ensure that the inner-cylinder wiring harness 2, the outer-cylinder wiring harness 7 and The connection between the wiring sleeves 6 is reliable, and it can also well block the leakage of fluid medium (such as oil) along the in-cylinder wiring harness 2 and the outer-cylinder wiring harness 7, so that the fluid medium (such as oil) is The rise of the multi-strand cable harness is no longer a problem.
  • fluid medium such as oil
  • the inner sealing member 8 is installed in the inner hole 32 of the cylinder piercer 3, which does not involve the injection molding of the protective shell 1, even if the injection molding part of the protective shell 1 and the cylinder piercer 3
  • the joint is not sealed in place, and it will not cause sealing troubles, because the sealing structure between the cylinder bore 3 and the installation bore on the cylinder body 5, and the sealing structure between the cylinder wiring harness 2 and the cylinder bore 3 will also effectively prevent leakage. Leakage occurs.
  • the inner sealing member 8 is not an injection molded part, the injection pressure during injection can be reduced; in addition, it can also avoid the use of high-quality overmolded rubber at this position for the in-cylinder wire harness 2 and the outer-cylinder wire harness 7, thereby reducing Purchasing cost of wiring harness inside the cylinder 2 and wiring harness outside the cylinder 7. Since the present invention is no longer a traditional injection molding method to ensure reliable sealing, the management of the injection molding steps of the protective shell 1 is no longer the key, and can be implemented with less precision, and the injection molding steps are simpler and faster. This simplifies the injection mold, thereby reducing the manufacturing cost, not only easy to implement, but also low in implementation cost.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

本发明提供一种穿缸线束密封结构，包括缸内线束(2)、穿缸器(3)、缸体(5)、接线套(6)及缸外线束(7)和内密封构件(8)，缸内线束(2)、缸外线束(7)分别与接线套(6)形成导电连接，接线套(6)安装在内密封构件(8)上的定位内孔(81)中、且与内密封构件(8)形成密封连接，内密封构件(8)安装在穿缸器(3)上的穿缸器内孔(32)中、且与穿缸器(3)形成密封连接，穿缸器(3)与缸体(5)之间形成密封连接。本发明可形成三重密封结构，并通过接线套有效地阻断流体介质在缸内线束与缸外线束之间渗透，极大地提高了穿缸线束与缸体之间的密封性能，具有易于实施、实施成本低等突出优点。

Description

一种穿缸线束密封结构 技术领域
本发明涉及穿缸线束密封设计领域，尤其是涉及应用于发动机缸体的一种穿缸线束密封结构。
背景技术
对于穿缸线束的密封设计，例如，安装在发动机缸体内的传感器或控制器与位于发动机缸体外的中央控制器之间的穿缸线束的密封设计，其中的穿缸线束需要穿过曲轴箱或缸体，因此，位于发动机缸体内的线束(即“缸内线束”)与对应的位于发动机缸体外的线束(即“缸外线束”)之间的连接在发动机缸体连接部存在密封问题。
现有的穿缸线束密封设计方案，通常是缸外线束与缸内线束直接相连(或者理解为一根线束)，通过穿缸器与线束一体注塑成型来进行密封。但是，由于穿缸器与线束胶皮属于不同的材质，发动机在高温、低温交替运行过程中，线束胶皮与穿缸器之间容易产生密封不严问题；另外，由于线束内的导体一般采用多股电缆线，因此，发动机缸体内的油可能会因为毛细作用而沿着多股电缆线上升或在多股电缆线之间上升，同样也会存在密封不严问题。
发明内容
本发明要解决的技术问题是：针对现有技术存在的问题，提供一种穿缸线束密封结构，提高穿缸线束与缸体之间的密封性能。
本发明要解决的技术问题采用以下技术方案来实现：一种穿缸线束密封结构，包括缸内线束、穿缸器、缸体、接线套以及缸外线束和内密封构件，所述的缸内线束、缸外线束分别与接线套形成导电连接，所述的接线套安装在内密封构件上的定位内孔中、且接线套与内密封构件之间形成密封连接，所述的内密封构件安装在穿缸器上的穿缸器内孔中、且内密封构件与穿缸器之间形成密封连接，所述的穿缸器与缸体之间形成密封连接。
优选地，所述的穿缸器上开设定位凹槽，所述的定位凹槽中安装密封圈，所述的密封圈与缸体之间形成接触密封结构。
优选地，所述穿缸器的一端形成限位凸肩，所述的限位凸肩与缸体之间形成接触密封结构。
优选地，所述穿缸器上的穿缸器内孔为锥形结构孔，所述内密封构件的一端形成锥形结构的导向部，所述的导向部与穿缸器内孔之间形成接触密封结构。
优选地，所述的接线套上开设盲孔，所述缸内线束的一端和/或缸外线束的一端插接入接线套上的盲孔中。
优选地，所述内密封构件上的定位内孔为阶梯结构孔，所述的接线套为阶梯轴结构，所述的接线套与内密封构件之间形成嵌接式密封结构。
优选地，还包括保护壳，所述的保护壳与穿缸器、缸体形成密封结构。
优选地，所述的保护壳是通过注塑成型方式与穿缸器、缸体形成密封结构。
与现有技术相比，本发明的有益效果是：通过接线套与内密封构件之间形成密封连接、内密封构件与穿缸器之间形成密封连接、穿缸器与缸体之间形成密封连接，由此可以形成三重密封结构，且其中的接线套还能有效地阻断流体介质在缸内线束与缸外线束之间渗透而造成渗漏，从而可以极大地提高穿缸线束与缸体之间的密封性能，并且易于实施，实施成本也低。
附图说明
为了更清楚地说明本发明实施方式的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技 术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。
图1为本发明一种穿缸线束密封结构的纵剖透视图(含保护壳)。
图2为本发明一种穿缸线束密封结构的纵剖透视图(不含保护壳)。
图3为图1或者图2中的缸内线束、缸外线束与接线套之间连接总成的剖视图。
图4为图1或者图2中的穿缸器的剖视图。
图5为图1或者图2中的内密封构件的剖视图。
图中部品标记名称：1-保护壳，2-缸内线束，3-穿缸器，4-密封圈，5-缸体，6-接线套，7-缸外线束，8-内密封构件，31-定位凹槽，32-穿缸器内孔，33-限位凸肩，81-定位内孔，82-导向部。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图和具体实施例对本发明进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1、图2、图3所示的穿缸线束密封结构，具体包括保护壳1、缸内线束2、穿缸器3、缸体5、接线套6、缸外线束7和内密封构件8，所述的穿缸器3上形成穿缸器内孔32，所述的缸体5上开设可供穿缸器3固定的安装内孔，所述的内密封构件8上形成定位内孔81。所述的缸内线束2、缸外线束7分别与接线套6形成导电连接，所述的接线套6安装在内密封构件8上的定位内孔81中、且接线套6与内密封构件8之间形成密封连接；通常，所述的接线套6使内密封构件8上的定位内孔81处于受压状态。如图5、图2所示，所述内密封构件8上的定位内孔81优选采用阶梯结构孔，所述的接线套6优选采用阶梯轴结构，所述的接线套6与内密封构件8之间形成嵌接式密封结构，以便接线套6与内密封构件8在组装过程中对接线套6进行轴向定向，并更好地限制接线套6在内密封构件8中的轴向定位位置。
所述的内密封构件8安装在穿缸器3上的穿缸器内孔32中、且内密封构件8与穿缸器3之间形成密封连接；通常，所述的内密封构件8是以受压配合的方式安装在穿缸器3上的穿缸器内孔32内。为了提高内密封构件8与穿缸器3之间的密封可靠性，如图1、图2、图4、图5所示，所述穿缸器3上的穿缸器内孔32采用锥形结构孔，与此对应的是，所述内密封构件8的一端形成锥形结构的导向部82，所述的导向部82与穿缸器内孔32之间形成接触密封结构。
所述的保护壳1与穿缸器3、缸体5形成密封结构；通常，所述的保护壳1是采用具有一定弹性的塑料材料、并通过注塑成型方式与穿缸 器3、缸体5形成密封结构，并使保护壳1与穿缸器3之间的接合部位于缸体5的一侧。通过保护壳1，可以使缸内线束2、缸外线束7分别相对于接线套6保持固定静止状态，确保缸内线束2、缸外线束7分别维持在给定位置，以避免电气连接中发生破损，例如由于导线疲劳所造成的破损，或者是由于振动或不正确处理而发生的破损。
所述的穿缸器3与缸体5之间形成密封连接。通常，所述的穿缸器3是定位安装在缸体5上的安装内孔中，为方便穿缸器3的定位、并提高穿缸器3与缸体5之间的密封性能，如图4所示，可以在穿缸器3上开设定位凹槽31，所述的定位凹槽31中安装密封圈4，所述的密封圈4与缸体5之间形成接触密封结构；另外，在穿缸器3的一端形成限位凸肩33，所述的限位凸肩33与缸体5之间形成接触密封结构。特别地，对于热冲击环境条件，通过设置密封圈4，可以提供很好的密封稳健性，特别是在冷启动过程中保证密封可靠，而且，即便是缸内线束2、缸外线束7的导线外皮被刺穿，例如在保护壳1注塑成型过程中或在发动机缸体使用过程中被刺穿，也能保证缸内线束2、缸外线束7的密封可靠性。
本发明通过接线套6与内密封构件8之间形成密封连接、内密封构件8与穿缸器3之间形成密封连接、穿缸器3与缸体5之间形成密封连接，由此可以形成三重密封结构，其中的接线套6还能有效地阻断流体介质在缸内线束2与缸外线束7之间渗透而造成渗漏，从而可以极大地提高穿缸线束与缸体5之间的密封性能，并且易于实施，且实施成本也 低。其中，如图1-图3所示，所述接线套6的两端最好是开设盲孔，所述盲孔的深度通常为10mm。所述缸内线束2的一端、缸外线束7的一端可以插接入接线套6上的盲孔中，再通过铆压或焊接方式加以连接固定，确保缸内线束2、缸外线束7与接线套6之间的连接可靠，并且，还可以很好地阻断流体介质(例如机油)沿着缸内线束2、缸外线束7渗透而导致的渗漏，使得流体介质(例如机油)沿着多股电缆线束上升不再是问题。
所述的内密封构件8安装在穿缸器3上的穿缸器内孔32中，其并没有涉及保护壳1的注塑成型，即使保护壳1的注塑成型部分与穿缸器3之间的接合没有密封到位，也不会造成密封麻烦，因为穿缸器3与缸体5上的安装内孔之间以及缸内线束2与穿缸器3之间的密封结构同样也会有效地阻止渗漏发生。由于内密封构件8不是注塑成型部分，因而可降低注塑时的注入压力；此外，也可以避免缸内线束2、缸外线束7在该位置上使用质量很好的包覆成型胶皮，从而可以降低缸内线束2、缸外线束7的采购成本。由于本发明不再是传统的注塑成型方式来确保密封可靠，使得保护壳1的注塑成型步骤的管理不再是关键，可以用较小的精度去实施，注塑成型的步骤也更简单、快捷，从而简化了注塑模具，进而减少了制造成本，不仅易于实施，而且实施成本低。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，应当指出的是，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (8)

  1. 一种穿缸线束密封结构，包括缸内线束(2)、缸体(5)和缸外线束(7)，其特征在于：还包括穿缸器(3)、接线套(6)和内密封构件(8)，所述的缸内线束(2)、缸外线束(7)分别与接线套(6)形成导电连接，所述的接线套(6)安装在内密封构件(8)上的定位内孔(81)中、且接线套(6)与内密封构件(8)之间形成密封连接，所述的内密封构件(8)安装在穿缸器(3)上的穿缸器内孔(32)中、且内密封构件(8)与穿缸器(3)之间形成密封连接，所述的穿缸器(3)与缸体(5)之间形成密封连接。
  2. 根据权利要求1所述的一种穿缸线束密封结构，其特征在于：所述的穿缸器(3)上开设定位凹槽(31)，所述的定位凹槽(31)中安装密封圈(4)，所述的密封圈(4)与缸体(5)之间形成接触密封结构。
  3. 根据权利要求1所述的一种穿缸线束密封结构，其特征在于：所述穿缸器(3)的一端形成限位凸肩(33)，所述的限位凸肩(33)与缸体(5)之间形成接触密封结构。
  4. 根据权利要求1所述的一种穿缸线束密封结构，其特征在于：所述穿缸器(3)上的穿缸器内孔(32)为锥形结构孔，所述内密封构件(8)的一端形成锥形结构的导向部(82)，所述的导向部(82)与穿缸器内孔(32)之间形成接触密封结构。
  5. 根据权利要求1所述的一种穿缸线束密封结构，其特征在于：所述的接线套(6)上开设盲孔，所述缸内线束(2)的一端和/或缸外线束(7)的一端插接入接线套(6)上的盲孔中。
  6. 根据权利要求1所述的一种穿缸线束密封结构，其特征在于：所述内密封构件
    (8)上的定位内孔(81)为阶梯结构孔，所述的接线套(6)为阶梯轴结构，所述的接线套(6)与内密封构件(8)之间形成嵌接式密封结构。
  7. 根据权利要求1-6任一项所述的一种穿缸线束密封结构，其特征在于：还包括保护壳(1)，所述的保护壳(1)与穿缸器(3)、缸体(5)形成密封结构。
  8. 根据权利要求7所述的一种穿缸线束密封结构，其特征在于：所述的保护壳(1)是通过注塑成型方式与穿缸器(3)、缸体(5)形成密封结构。
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