EP2688151A1 - Connection device for power semiconductor device with a sealed connector - Google Patents

Abstract

The assembly (10) has a connector having leads (31) connected to a contact unit (32) provided with a positioning device (321) and a sealing plastic housing (40). The sealing plastic housing is integrally formed with two mutually corresponding joinable structure (41), for sealing of the connection unit to a respective recess in the housing of the power semiconductor device. A first plate (410) and a second plate are arranged on the joinable structure. A recess is used for receiving the leads and contact unit. An independent claim is included for a method for forming connection with link assembly.

Description

The invention relates to a connecting device for a housing having a power semiconductor device, wherein the connecting device comprises a connector with a supply line with connected contact device and a molded article, advantageously, the connecting device comprises a plurality of connectors. Such connecting devices are used in power electronics.

Such connecting devices must be able to function for many years under harsh environmental conditions. Corrosive loads such as humidity, vapors, water, etc. lead to a limitation of use or failure of the connection produced. For safety reasons, industrial connectors must also be protected against external influences such as Dust, water etc. are protected. This protection must be ensured by the housing and its locking as well as a suitable seal.

It is known to use special connectors for sealing a plug connection device against splash water according to the degree of protection IP 54 or higher, which are splash-proof and can be tightly mounted. Commercially available connectors have customary molded seals made of an elastic sealant, for example silicone, on.

From the publication WO 2006/054574 a waterproof female connector which is connectable with a connector is known, wherein the connector is provided with a plurality of male terminals, each of which has a front end portion as the electrical connector portion, the male terminal of a connector housing projecting forward and is held by the male housing is provided with projections each projecting from a front surface of the male housing for a corresponding male terminal to cover a rear portion of an electrical connection portion, the female waterproof connector comprising: a plurality of female terminals into which the electrical connection portions of the male terminals are respectively fitted are; a female housing comprising: terminal receiving chambers for receiving the respective female terminals; Terminal lock portions for locking the female terminals in the respective terminal receiving chambers and male terminal insertion opening into which the male terminals for inserting into the female terminals are respectively insertable, the male terminal insertion holes being formed in front of the female terminals; a waterproof sealing member made of elastic material having a shape for close contact with a front surface of the female housing and a sealing member holder for holding the waterproof sealing member.

A disadvantage of the o.g. The prior art is that commercially available splash-proof connectors often cause additional costs, since already pre-assembled connectors must be adapted to it and possibly the existing connectors must be replaced by the splash-proof.

The invention has for its object to present a connection device which has at least one protection according to the protection class IP54, in particular IP 65, the use of pre-assembled standard connectors is possible, said connection means should be protected in itself and the housing sealed against splashing ,

This object is achieved by a connecting device with the features of claim 1. Preferred embodiments are described in the respective dependent claims. The formation of such a connection takes place according to the features of claim 11.

The connecting device according to the invention is provided in particular for the connection of control lines to a housing having a power semiconductor device. The connecting device has a sealant molding and at least one connector with a supply line with connected contact device, wherein the contact devices are each formed with a positioning device, and wherein the sealant molding is preferably formed integrally with two mutually corresponding mating part bodies. To seal the connecting device relative to an associated second recess in the housing of the power semiconductor device has on its outer side first fins. At the respective inner side of the partial body second slats are arranged, wherein the second slats of the partial body are arranged interlocking. Furthermore, the connecting device preferably has a plurality of first recesses for receiving zugeorndeter leads or the contact means.

The connecting device according to the invention consists sealing elements consists advantageously only of an element which is formed as a one-piece sealant molding with two mutually corresponding joined body parts, which are connected by means of a bendable tab. As a result, a quick and easy assembly and disassembly of the connector is possible. This embodiment offers the advantage of cost-effective production of the sealant molding, for example by injection molding. Alternatively, the sealant molding could also be formed from two or more mutually corresponding sub-bodies.

It is also advantageous that different connector designs can thus be arranged with different contact devices and different supply line. It is therefore possible to use different configurations of optical waveguides or electrical conductors.

Another advantage is when the sealant molding in the assembled state envelops only a portion of the connector. As a result, a part of the contact means is free, which can be arranged in the associated socket, which is not part of the connecting device.

Furthermore, it proves to be advantageous if the sealant molding is formed in its entirety from an elastic material. This will be a Long-term sealing effect ensured. It is also advantageous if the sealant molding is formed of electrically insulating material. As a result, no additional insulation of the connector is needed.

Furthermore, it proves to be advantageous if the sealant molding on the part bodies, which are accessible even after the arrangement in the connecting device in the housing, further tabs. As a result, the connecting device can be easily inserted into the housing and again easily removed from the housing. In addition, the tabs offer the advantage that the supply lines of the connector can be fixed by compressing the tabs when removing the sealant molding from the housing.

Furthermore, it proves to be advantageous if a part body has a nose, preferably a latching nose, and the corresponding part body has an associated recess. As a result, the partial bodies are mechanically fixed in addition to each other. Another embodiment would be a non-detachable connection, in which the part bodies are connected by way of example by gluing.

Furthermore, it proves to be advantageous if the sealant molding has at least one stop edge, which is formed in each case for abutment against an associated abutment in the housing. This ensures a tight and permanent fit.

• Einlegen des Steckverbinders in einen Teilkörper des Dichtstoffformkörpers
• Verschließen der Teilkörper des Dichtstoffformkörpers
• Zusammenfügen des Dichtstoffformkörpers mit dem Gehäuse

The invention also describes a method for forming a connecting device according to the following method steps:

• Inserting the connector into a partial body of the sealant molding
• Closing the partial body of the sealant molding
• Assembly of the sealant molding with the housing

When inserting the connector, the leads are inserted with connected contact means in the first recesses in one of the two body part. The connector is inserted with slight pressure, so that the slats include the leads partially.

When closing the two partial body of the sealant molding, the body parts are pressed together. In this case, the locking lug of a part body engages in the associated Einrastausnehmung of the corresponding part body.

The last method step involves the assembly of the sealant molding with the housing. Here, the connecting device is inserted into the housing of the power semiconductor device.

The advantage of this method is that the connecting device can be quickly mounted according to the above method steps. In addition, the method is simple, so that even non-specialist personnel can perform these steps.

• Fig. 1 eine erfindungsgemäße Verbindungseinrichtung mit perspektivischer Ansicht des Innenbereichs des Dichtstoffformkörpers,
• Fig. 2 eine dreidimensionale Darstellung einer erfindungsgemäßen Verbindungseinrichtung,
• Fig. 3 eine dreidimensionale Darstellung einer erfindungsgemäßen Verbindungseinrichtung mit einem Gehäuse,
• Fig. 4 eine Schnittdarstellung der Verbindungseinrichtung gemäß Fig. 3.

A preferred embodiment of the invention is in the FIGS. 1 to 4 and will be explained in more detail below. Showing:

• Fig. 1 a connection device according to the invention with a perspective view of the inner region of the sealant molding,
• Fig. 2 a three-dimensional representation of a connecting device according to the invention,
• Fig. 3 a three-dimensional representation of a connecting device according to the invention with a housing,
• Fig. 4 a sectional view of the connecting device according to Fig. 3 ,

Same details are in the Fig. 1 to 4 each with the same reference numerals, so that it is unnecessary, in conjunction with all figures to describe all the details in detail.

Fig. 1 shows a three-dimensional representation of a connecting device 10 according to the invention with a perspective view of the inner region of the sealant molding 40. The integrally formed sealant molding 40 is shown here in the open state with the two part bodies 41. In one of the two partial bodies 41, the plug connectors 30, that is to say the two supply lines 31 with connected contact devices 32, are shown inserted. The contact devices 32 are connected to the supply lines 31 in each case via a shaft-shaped coupling 323. The coupling 323 may be formed of a metal or plastic. Under the coupling 323, a further positioning device 322 is arranged in the form of a flat circular disc, which is followed by a cylindrical contact pin with a positioning device 321.

The supply lines 31 are included in the area above the coupling 323 of lamellae 420. As a result, the leads 31 are arranged slip-resistant in the body part. The lamellae 420 are in both partial bodies 41, at the same height as the lamellae 410 on the outside of the body part 41, mounted and connected thereto. In addition, they are flat and formed in 2 rows with respective recesses 430 in two rows for the leads 31 and arranged offset on the sub-bodies against each other. As a result, the lamellae 420 engage in the joining of the body part 41 of the molded article 40 into each other and close it.

The corresponding part body 41 has, perpendicular to a sealing edge 440, two recesses 430 which extend from the underside of the part body 41 to the sealing edge 440. In the upper part, the recesses 430 adapted for the leads 31 are formed. In the lower part of the part body 41, the recesses 430 are formed in the form of the contact means 32. The recesses 430 also have the shape of the wave-shaped coupling 323, the underlying flat disc-shaped further positioning device 322 and the cylindrical contact pin. The recesses 430 can each be designed basically arbitrarily and for different types of connectors 30.

In addition, a latching nose 45 is disposed in the lower part of the body part 41. This is cylindrical with circumferential lamellae, formed from the same material as the sealant molding 40 and arranged perpendicular to the sealing edge 440. In the corresponding part body 41, an associated Einrastausnehmung 46 is arranged. By this latching function, the two body parts 41 are held together in the assembled state.

The two body parts 41 are connected to each other via an elastic tab 42. The tab 42 is formed as a web, which is arranged at the top of the sealant molding 40 centrally to the sealing edge 440. For a better collapsibility, the tab 42 in the middle of a thinning of the material.

The molded article 40 has two semicircular further tabs 43, which are also arranged on the upper side, longitudinally at the edge region of the body part parallel to the sealing edge 440. As a result, the connecting device 10 can be easily removed or inserted from the housing on the basis of the two further tabs 43. The tabs 43 may also be formed in a different geometry.

Fig. 2 shows a three-dimensional view of a connecting device 10 according to the invention, the two connectors 30 with its two leads 31 with connected contact means 32 and a molded article 40 has. The sealant molding 40 has, as already in Fig. 1 described, on the top of a tab 42 for connecting the two body parts 41 and semi-circular tabs 43. The upper part of the molded article 40 is formed in the shape of a cuboid with rounded corners on the opposite broad sides. Under this upper part circumferential lamellae 410 are arranged on the outside of the body part 41. These fins 410 are formed flat and arranged in two rows one above the other.

The lower part of the molded article 40 is also designed as a cuboid, which is stepped bevelled on the broad sides. In addition, the lower part is formed by a small, centrally positioned rectangular recess with a chamfer to the underside of the molded article 40 towards. By the step-shaped bevel stop edges 44 are formed on the broad sides of the body part 41, the slippage of the connecting device 10 through the housing 20 (see. Fig. 4 ) prevent.

From the lower part of the sealant molding 40, perpendicular to the sealing edge 440 through the recesses 430, the contact devices 32 project with a positioning device 321, which after insertion of the connecting device 10 into the housing 20 (cf. 3 and 4 ) are connected to an associated socket. Between the semicircular tabs 43 protrude centrally through a recess on the longitudinal side of the sealing edge 440 of the molded article 40, two leads 31, which are designed as electrical conductors or optical waveguides. By positioning between the tabs 43, the leads 31 can be held by the compression of the tabs 43 during removal or insertion of the sealant molding 40 and slipping is prevented.

Fig. 3 shows a three-dimensional view of a connecting device 10 according to the invention with integrated connectors 30 and a housing 20. The housing 20 is integrally formed in the shape of a cuboid with dome-like outstanding upper part and with rounded corners on the opposite broad sides. The molded article 40 is integrally formed from two mutually correspondingly joined part bodies 41.

A sealing edge 440 of the assembled part body 41 is parallel to the longitudinal sides of the housing 20. Both part body 41 are connected by a bendable tab 42 which is arranged laterally on the upper side of the sealant molding 40. As a result, a problem-free insertion of the connecting device 10 in the housing 20 is possible because the tab 42 is disposed by their positioning above the housing 20.

Fig. 4 shows a sectional view of the connecting device 10 with a housing 20 according to the FIG. 3 , The molded article 40 is shown in the assembled state with inserted connectors 30. The housing 20 has a recess 21 into which the molded article 40 is inserted. The recess 21 has two abutments 22 on which the stop edges 44 of the body part 41 rest. In addition, the louvers 410 seal toward the housing 20.

LIST OF REFERENCE NUMBERS

1

Power semiconductor device

10

connecting device

20

casing

21

second recess

22

abutment

30

Connectors

31

Lead of 30

32

Contact device of 30

321

positioning

322

further positioning device

323

clutch

40

Sealant moldings

41

partial body

410

first lamella

420

second lamella

430

first recess

440

sealing edge

42

bendable flap

43

further tab

44

stop edge

45

locking lug

46

engaging recess

Claims (11)

Connecting device (10) for a power semiconductor device (1) having a housing (20), wherein the connecting device (10) has a sealant molding (40) and at least one connector (30) with lead (31) with connected contact device (32), wherein the Contact device (32) with a positioning device (321) are formed, and wherein the sealant molding (40) Is formed in one or more pieces with at least two mutually corresponding joinable part bodies (41), For sealing the connecting device (10) with respect to an associated second recess (21) in the housing (20) of the power semiconductor device (1) on its outside first lamellae (410), • on the respective inner side of the body part (41) arranged second lamellae (420), wherein the second blades (420) of the body part (41) engage in the assembled state and • at least one first recesses (430) for receiving a supply line (31) and the contact device (32). A connector (10) according to claim 1, wherein the connector (30) is adapted to transmit optical or electrical signals. Connecting device (10) according to claim 1 or 2, wherein the sealant molding (40) in the assembled state encloses a portion of the connector (30). Connecting device (10) according to one of the preceding claims, wherein in each case two part-bodies (41) are interconnected by means of a bendable tab (42). Connecting device (10) according to one of the preceding claims, wherein the sealant molding (40) is formed of elastic material. Connecting device (10) according to one of the preceding claims, wherein the sealant molding (40) is formed of electrically insulating material. Connecting device (10) according to one of the preceding claims, wherein the sealant molding (40) on the part bodies (41) arranged further tabs (43). Connecting device (10) according to one of the preceding claims, wherein a part body (41) has a nose, in particular a latching lug (45), and the corresponding part body (41) has an associated recess (46). Connecting device (10) according to one of the preceding claims, wherein the sealant molding (40) has a stop edge (44) which is designed to abut against an abutment (22) of the housing (20). Power semiconductor device (1) according to one of the preceding claims, wherein the power semiconductor device (1) has a housing (20) and a connecting device (10). Method for forming a connection with a connecting device (10) according to Claims 1 to 9, having the following method steps: Inserting connectors (30) into a part body (41) of the sealant molding (40) Closing the part bodies (41) of the sealant molding (40) • Assembling the sealant molding (40) with the housing (20).

Images