WO2007131821A1

WO2007131821A1 - Electrical plug with force-decoupled sealing plate

Info

Publication number: WO2007131821A1
Application number: PCT/EP2007/052553
Authority: WO
Inventors: Markus Kroeckel
Original assignee: Robert Bosch Gmbh
Priority date: 2006-05-15
Filing date: 2007-03-19
Publication date: 2007-11-22
Also published as: EP2020057A1; DE102006022487A1; EP2020057B1

Abstract

In an electrical plug (1) with a sealing plate (4), which is arranged between two plug housing parts (2, 3) and has an inner sealing region (6) with through-holes (7, 8) and an outer sealing region (9), which annularly surrounds the inner sealing region (6) and extends radially outwards beyond the plug-in face (5) of the plug (1), the invention provides that the inner sealing region (6) has at least one peripheral lateral surface (11) on the outside and the outer sealing region (9) has at least one peripheral lateral surface (12) on the inside, and that a peripheral lateral surface (15) on the inside is provided as a radial bearing face for the lateral surface (11) on the outside of the sealing plate (4) on one plug housing part and a peripheral lateral surface (16) on the outside is provided as a radial bearing face for the lateral surface (12) on the inside of the sealing plate (4) on one or the other plug housing part.

Description

Electrical plug with force-decoupled sealing plate

State of the art

The invention relates to an electrical connector according to the preamble of claim 1, as shown in Fig. 3.

Conventional sealed electrical plug connections usually consist of two seals, both of which are provided on a plug of the plug-in connection and respectively seal the plug-in surface (interface) to the mating plug of the plug connection and the wiring harness (lines). There are also plug connections are known in which interface and lines are sealed by means of a plug provided on the single sealing element. 3a shows such a known electrical connector 101, in which a sealing plate (mat seal) 104 is axially pressed between a contact carrier lower part 102 and an upper part 103. This axial compression is generated by holding elements (not shown), which hold the two plug housing parts 102, 103 together. As shown in Fig. 3b, the sealing plate 104 has an inner sealing portion 106 with a plurality of small passage openings 107 and a large passage opening 108, pass through the electrical lines (wiring harness) or another part (plastic part), and an outer

Sealing portion 109 which surrounds the inner sealing portion 106 annular and extends outwardly beyond the plug surface 105 of the plug 101 addition. The sealing plate 104 is replaced by the axial compression between the two connector housing parts 102, 103, the necessary stability, which is necessary for the maintenance of the radial sealing pressure against the mating surface of a mating connector (not shown). However, the large passage opening 108 is partially widened by the guided plastic part, which can lead to a non-uniform sealing pressure and the leakage of the sealing plate 104. Furthermore, the contact elements are subject to increased wear due to the coupling of contact carrier upper part and lower part by means of holding elements.

Disclosure of the invention

Technical task

It is the object of the invention to decouple the inner and the outer sealing region from one another in a generic electrical connector and to be able to achieve the radial sealing pressure even without axial compression of the sealing plate.

Technical solution

This object is achieved by an electrical connector with the features of claim 1. Advantageous effects

The inventive electrical connector with the characterizing features of

Patent claim 1 has the following advantages:

• The housing-side contact surfaces serve as radial force support. As a result, on the one hand, the radial sealing pressure of the sealing plate to the mating surface of the mating connector regardless of the axial compression of the sealing plate between the two connector housing parts. And on the other hand, thereby the outer and the inner sealing portion of the sealing plate are independent of each other, i. decoupled. Feedthroughs (especially large feedthroughs) in the interior

Sealing area are possible without negative impact on the outer sealing area and thus on the radial seal with the mating surface of the mating connector. Thus, it is possible both lines and bushings (eg chambers for EAD (single-wire seal) -sealed contacts) without affecting the sealing pressure on the interface seal to seal as well as an axial force on the sealing plate as a prerequisite for a sufficient sealing pressure to renounce.

• The two connector housing parts are largely decoupled from each other, whereby wear in the contact points of the connector is reduced. • By merging the standard components "Radial Seal" and

"Line sealing" reduces the number of individual elements of a plug connection and eliminates or reduces tooling, production, assembly and logistics costs, which results in cost advantages.

• Due to higher vibration resistance of the connector according to the invention, the risk of failure of the connector in the trial is lower. As a result, envelopes can be tested at a higher level, which ideally include all relevant practice cases for the application. This can reduce the risk of failure and the cost of multiple trials compared to standard concepts. • The reduction of components is basically accompanied by a reduction of errors.

The plug according to the invention makes it possible to decouple the plug housing part, which has the contact carrier function, from the other plug housing part. As a result, in principle, the relative movement between the two connector housing parts is greatly reduced and, depending on the implementation, entirely prevented, so that increases the wear resistance of the connector.

Further advantages and advantageous embodiments of the subject invention are the description, the drawings and claims removed.

Brief description of the drawings

Two embodiments of the electrical connector according to the invention are illustrated in the drawings and explained in more detail in the following description. Show it:

Fig. 1a shows a first embodiment of the electrical connector in longitudinal section; FIG. 1 b shows the seal of FIG. 1 a in a plan view; FIG.

Fig. 2a shows a second embodiment of the electrical connector in the

Longitudinal section;

FIG. 2b shows the seal of FIG. 2a in a plan view; FIG.

3a shows a known in the prior art electrical connector in longitudinal section; and

FIG. 3b shows the seal of FIG. 3a in a plan view; FIG.

Embodiments of the invention

The electrical connector 1 shown in Fig. 1a comprises two connector housing parts, namely a contact carrier lower part 2 and an upper part 3, and a sealing plate arranged therebetween (mat seal) 4, for sealing the plug surface 5 of the plug 1 and the interface of the connector and for sealing of running in the plug 1 electrical lines (wiring harness) or other

Feedthroughs serves. The sealing plate 4 is made of rubber-elastic material and can be arranged with or without axial compression between the two connector housing parts 2, 3. As shown in Fig. 1b, the sealing plate 4 has an inner sealing portion 6 with through holes (passage openings) 7, 8, through which the electrical wires pass, and an outer sealing portion 9, which surrounds the inner sealing portion 6 annular and outwardly to extends beyond the plug 5 addition. The two sealing areas 6, 9 are located in a common plane. Between both sealing regions 6, 9 an annular groove 10 is provided on both sides of the sealing plate 4, the inner groove flank form a circumferential outer side surface 11 and the outer groove flank a circumferential inner surface 12 of the sealing plate 4. Between the two annular grooves 10, the sealing plate 4 on an annular ridge 13 through which the two sealing regions 6, 9 radially spaced or separated.

On the mutually facing sides, the contact carrier lower part 2 and the upper part 3 each have annular projections 14, which engage in the annular grooves 10. The inner flanks of the annular projections 14 each form a circumferential inner lateral surface 15 as a radial contact surface for the outer lateral surface 11 of the sealing plate 4, and the outer edges of the annular projections 14 each form a circumferential outer lateral surface 16 as a radial contact surface for the inner lateral surface 12 of the sealing plate 4. The composite of the contact carrier lower part 2, upper part 3 and sealing plate 4 is held together by means of one or more through openings 17 of the sealing plate 4 guided holding elements 18. Only when mated by means of a locking system unspecified described here reaches a state in which a force compresses the sealing plate 4 and thus the positive connection between the retaining element 18 and picks up. In this state, the upper part 3 is mechanically largely decoupled from the contact carrier lower part 2.

By the housing-side contact surfaces 15, 16, which serve as a radial force support of the sealing plate 4, the radial sealing pressure of the outer sealing portion 9 against the mating surface of the mating connector regardless of the axial compression of the sealing plate 4 between the two connector housing parts 2, 3. Furthermore, the outer and the inner sealing region 6, 9 of the sealing plate 4 are substantially independent of one another in terms of their forces, ie decoupled. Bushings through the large passage opening 8 in the inner sealing region 6 are without negative Influence on the outer sealing region 9 possible, so that there is a uniform radial sealing pressure with the mating surface of the mating connector.

From the electrical connector 1, the electrical connector 1 'shown in Fig. 2a differs in that here the sealing plate 4' is stepped and therefore, as shown in Fig. 2b, the inner and the outer sealing portion 6 ', 9' of the sealing plate 4th lie in other levels, ie axially spaced apart. In addition, the inner and outer lateral surfaces 11 ', 12' of the sealing plate 4 'on different sides of the sealing plate 4' and each formed by a in the sealing plate 4 'provided level 10'. The associated housing-side lateral surfaces 15 ', 16' are provided on the contact carrier lower part 2 'or on the upper part 3' and are each formed by a step 10 'of the plug housing parts 2', 3 '. The two sealing regions 6 ', 9' are connected to one another via an annular axial web 13 '. The composite of contact carrier lower part 2 ', upper part 3' and sealing plate 4 'is held together by means of one or more holding elements 18' guided through openings 17 'of the sealing plate 4'. The sealing plate 4 'is made of rubber-elastic material and can be arranged with or without axial compression between the two connector housing parts 2', 3 '.

By the housing-side contact surfaces 15 ', 16' and in that the inner sealing region 6 'with its through holes 7', 8 'on a different plane as the outer sealing region 9', on the one hand, the radial sealing pressure regardless of the on the sealing plate 4th 'acting axial force and on the other hand, a mutual influence of the two sealing regions 6', 9 'excluded. In addition, no axial force on the sealing plate 4 'is necessary for achieving the sealing function.

Claims

claims

1 . Electric plug (1; V) having a sealing plate (4; 4 ') arranged between two plug housing parts (2, 3; 2', 3 ') which has an inner sealing area (6; 6') with through holes (7, 8; ', 8') and an outer sealing region (9, 9 ') which surrounds the inner sealing region (6, 6') and extends radially outward beyond the mating surface (5, 5 ') of the plug (1, 1'). extends, has, characterized in that the inner sealing region (6; 6 ') at least one circumferential outer lateral surface (1 1; 1 1') and the outer sealing region (9; 9 ') at least one circumferential inner lateral surface (12; 12 ') and that on one plug housing part a circumferential inner lateral surface (15, 15') as a radial contact surface for the outer lateral surface (1 1, 1 1 ') of the sealing plate (4, 4') and on one or the other plug housing part a circumferential outer lateral surface (16, 16 ') as a radial contact surface for the inside Ma ntelfläche (12, 12 ') of the sealing plate (4; 4 ') is provided.

2. Electrical connector according to claim 1, characterized in that the inner and outer lateral surfaces (1 1, 12) of the sealing plate (4) on the same side of the sealing plate (4) and the associated housing-side lateral surfaces (15, 16) on the same Plug housing part are provided.

3. Electrical connector according to claim 1 or 2, characterized in that the sealing plate (4) on both sides in each case an inside and an outside

Mantle surface (1 1, 12) and the associated housing-side lateral surfaces (15; 16) are respectively provided on both connector housing parts.

4. Electrical connector according to one of the preceding claims, characterized in that the inner and outer lateral surfaces (11; 12) of the sealing plate (4) through the two groove flanks of an in the sealing plate (4) provided annular groove (10) and the inner and outer lateral surfaces (15; 16) of the plug housing part through the two flanks of a

Ring projection (14) are formed.

5. Electrical connector according to one of the preceding claims, characterized in that the inner sealing region (6) and the outer sealing region (9) are radially spaced from each other.

6. Electrical connector according to claim 1, characterized in that the inner and outer lateral surfaces (11 ', 12') of the sealing plate (4 ') on different sides of the sealing plate (4') are provided and the associated housing-side lateral surfaces (15 '. 16 ') at both

Plug housing parts (2 ', 3') are provided.

7. Electrical connector according to claim 6, characterized in that the inner and outer lateral surfaces (11 ', 12') of the sealing plate (4 ') in each case by a in the sealing plate (4') provided stage (10 ') and the housing side inside and outside lateral surfaces (15 ', 16') in each case by a step (10 ') of the plug housing parts (2', 3 ') are formed.

8. Electrical connector according to claim 6 or 7, characterized in that the inner sealing region (6 ') and the outer sealing region (9') are axially spaced from each other.

9. Electrical connector according to one of the preceding claims, characterized in that the sealing plate (4, 4 ') between the two plug housing parts (2, 3, 2', 3 ') is axially compressed.