EP0963012A1 - Pin coding system - Google Patents

Abstract

A first plug parameter is encoded using the angular orientation of an encoded pin section. The encoding surface is formed by a wave crest region running parallel to the encoded pin axis, and a wave trough region. The surface contours of the crest and trough are axially symmetrical about the encoded pin axis (A). A second parameter is encoded by two encoding states, the first state having the crest and trough in mirror symmetry to the second state. Independent claims are also included for a charging connector with a plug and socket, and a charging connector set.

Description

The present invention relates to a coding pin system for connectors for coding at least a first connector parameter and a second connector parameter, with at least two pluggable coding pins, each coding pin one in a plurality of predetermined angular positions rotated about the coding pin axis in a receiving device of a connector component insertable mounting section and includes an encoding section which mates with an encoding section of another Coding pin for coding the same first and second connector parameters can be plugged over in such a way that the coding surfaces of the coding pin axis run parallel Coding sections lie essentially on top of one another, the coding pin sections for Coding the first connector parameter in a predetermined, compared to the Fastening section are arranged around the coding pin axis rotated angular position.

Such a coding pen system is e.g. known from EP 0 354 582 B1. That in this Coding pin system described is used for multipole charging connectors, used in particular for electric industrial trucks, their batteries or chargers. The mating face of this charging connector essentially comprises two main contacts arranged parallel to each other and two pilot contacts arranged parallel to each other as well as a coding pen. The coding pin mainly has the task of to encode the maximum permissible voltage level of such charging plug devices, so that mating with charging connectors of other maximum permissible voltages, especially lower voltages, is prevented. In addition to this voltage coding the coding pin should also code another connector parameter. This parameter indicates whether it is a wet or dry loading system. When charging wet batteries, it is common to increase the charging efficiency, an electrolyte circulation or an exchange or replenishment of battery fluid to make. It is therefore convenient for the charging connector to be used simultaneously equipped with a fluid connector. This can be integrated in the charging socket face or be designed as a piggyback system. In any case, one is required Differentiation between a wet and dry charging system for dry batteries, at which no fluid connector is provided to ensure.

In the above-mentioned publication, the coding pin has a polygonal cross section for this purpose Base section that, according to the number of sides of the polygon in a correspondingly complementary receptacle in the connector housing is insertable. The polygon shape used determines the number of voltage encodings. The coding section of the coding pin has in one embodiment a halved cross section of the same polygon shape to make a distinction To reach between dry and wet loading systems are with the coding pins for the wet charging connector, the coding areas in the middle of the side surfaces of the Polygons divided, whereas the dry charging plug halves along the corners of the polygon cross section. The coding pins for the wet and Dry systems differ with the same voltage coding in that the Halving area or coding area of the coding section by half the angle α um the coding pin axis is rotated. The angle α is the corner angle of the used polygon shape. But this also means that the minimally occurring Restricted area, which will occur most frequently in practice, due to a cross-sectional area of the polygon is marked with half the angle α.

This configuration of the coding pins for wet and dry systems also opens up the Possibility to provide a universal coding pin with the same voltage coding both with the wet charging connectors and with the dry charging connectors can be plugged. This is particularly true for the charging connector advantageous provided on the industrial truck for connecting the batteries is. This connector should be the same with both wet and dry batteries Voltage can be plugged. The universal coding pin has a coding cross section, which has an area reduced by the aforementioned minimum restricted area.

The coding pen system described above is currently the most Established system for charging plugs. Although in the publication the Possibility is described to use a polygon shape with more than six edges, In practice, only the use of a hexagon has prevailed because of this a restricted area with sufficient security is obtained. The use of a Polygon shape with more than six edges is considered too unsafe. About that In addition, the coding sections are in the inserted state of the charging connector in a suitably shaped housing cavity so that they are not too can dodge very sideways. This is particularly important if there are two charging plugs should be accidentally plugged in that are not the same coding have, since this affects considerable forces on the coding area.

Due to the latest innovations in the battery sector, more and more batteries can be used higher voltages are offered with the same volume. Hereby it is necessary to increase the number of coding options for the voltages, without sacrificing simultaneous coding for wet and dry systems. At the same time, however, there should still be sufficient security against incorrect connections remain.

It is therefore the object of the present invention a coding pin system of the beginning to provide the type mentioned, through which the coding possibilities of a first connector parameter while retaining the coding options for a second connector parameter can be increased without significant losses in terms to have to accept a minimal restricted area.

This object is achieved in that a first area of the coding area of a wave crest parallel to the coding pin axis and a further area formed by a trough running parallel to the coding pin axis is, the contour course of the surface of the wave crest and the contour course the surface of the wave valley essentially axisymmetric to the coding pin axis are configured, and that the second connector parameter by two coding states is characterized, wherein in the first coding state the crest and the Wave trough of the coding pin to the wave crest and wave trough of a coding pin in the second Coding state essentially mirror-symmetrical to a the coding pin axis essentially completely contained level are arranged.

This configuration ensures that the entire 360 ° range for the The angular position of a coding section is only available for coding the first connector parameters can be used. It will double of the coding possibilities achieved.

An embodiment is also known from EP 0 354 582 B1, in which one already Coding pin described above for wet charging systems with a halved hexagon cross section is used and the coding pin for dry loading systems a coding area has, in which a groove and a web projecting beyond the central plane are provided are. The most frequently occurring minimum restricted area then only results from the web cross-section projecting beyond the central plane. By such Embodiment could increase the number of voltage coding possibilities be, however, this would be at the expense of the minimum restricted area that this embodiment is extremely small. For this reason, this embodiment could also not prevail on the market and is considered too unsafe.

The different coding between the first coding state and the second Coding state of the second connector parameter is in the present invention made possible by a mirror symmetry of these two coding states. There are thus an angular range of 360 ° is available for both coding pin states. When comparing the coding pen system used in practice with one Coding pen system according to the present invention, the coding section of both The coding pin system according to the invention has systems of the same area size the same minimum restricted area, although the number of coding options is doubled for the first connector parameter. The degree of reproduction The coding options of course depend on the optimization of the mirror-symmetrical shape of the coding sections in the first and second coding state from. In such an embodiment, even the minimum restricted area, those regarding two coding pins with the same first connector parameter, however different second connector parameters is formed compared to the previous one System doubled.

The terms axisymmetric and mirror symmetry are in this context to be understood so that the entire coding section does not strictly meet these requirements Must meet as long as the desired pluggability and / or locking effect can be achieved is. When using e.g. Plastic injection molded parts as coding pins are quite conceivable e.g. Coding area in places for manufacturing reasons or to save material to be provided with cutouts, but which have no influence on the coding effect and not necessarily be arranged symmetrically to the pluggable coding pin have to.

A particularly favorable embodiment is achieved in that the contour course the coding surface perpendicular to the coding axis for the second coding state S-shaped and the contour course of the coding surface perpendicular to the coding axis for the first coding state is mirror-inverted S-shaped. This has the advantage that the restricted areas, those with the same second connector parameter and different first Connector parameters occur, are crescent-shaped and not as in State of the art triangular. As a result, the restricted areas are relatively close to the coding pin axis a considerable width that almost over a larger area is constant. This also leads to a more even distribution of force in one Mismatch attempt. In the coding pen systems used so far there is the largest percentage of restricted areas outdoors, which is why the buckling forces are greater are, whereby the coding section tends to evade easier.

In order to be able to use the area as completely as possible and a better symmetry The entire cross section of a coding section can also be obtained with regard to the loads to the entire cross section of a pluggable coding section in be designed substantially axisymmetric to the coding pin axis. Especially in a combination with claim 2, this results in a cross-sectional division between the two pluggable coding sections with a yin-yang pattern can be compared. This is one within the scope of the invention excellent optimization of space utilization. To achieve this advantage two pluggable coding sections can together form a circular cross section form, each coding section having a cross-sectional area substantially different from that Size of half the circular cross section.

A considerable expansion of the coding pen system is achieved in that a Coding pin is provided with a universal coding section, which with the coding sections for coding a same first connector parameter and independently of the coding state of the second connector parameter, whose Angular position with respect to the fastening section and its cross-sectional size result from the size and position of the free cross-section, that of an overlay the cross section of the coding section for the one first connector parameter and first coding state of the second connector parameter and the cross section the coding section for the same first connector parameter and second coding state of the second connector parameter remains free. This free one Cross section is created in that the two troughs of the coding pins each other are facing, whereas the wave crests overlap. Due to the fact, that both cross-sections cover half the area of the entire coding cross-section, due to the superimposition of the wave crests, a residual cross section must be created remain free. This residual cross section becomes the design of the universal coding section used. The actual cross-sectional shape of the universal coding section then depends on the degree of coverage of the two cross sections.

A particularly large cross section for the universal coding section is according to one Embodiment achieved in that the two superimposed cross sections on the outer circumference of the circular cross section leave a section of an arc that starts from the coding pin axis has an opening angle β of at least 60 °, preferably 85 °. Such a cross section has a considerable one over a relatively large area Thickness and therefore sufficient stability.

The cross section of the universal coding section thus generated ensures that also with respect this the minimum restricted area is maintained and no compromises regarding of the other two cross-sectional shapes have to be accepted.

The fastening section can advantageously have a shape such that it rotated into the receiving device in predetermined angular steps about the coding pin axis can be used. Such an embodiment is advantageous because the angular steps preferably have the same size and thereby precisely defined coding states let generate.

For this purpose, the fastening section can advantageously have a polygonal cross section.

To save material there is also the possibility that the fastening section has a star-shaped cross section. Such a star cross section can both in a star-shaped receptacle as well as in a plug-in receptacle with a polygonal cross-section be insertable.

Because of the available blocking surfaces, the fastening section can preferably be used have a shape so that it has at least 8, preferably 12, coding positions can be inserted into the receiving device.

Furthermore, the invention relates to a charging connector with a plug and a box, each of which can be plugged into one another of the coding pin system of the coding pin system according to any one of claims 1 to 10. The coding pen system is sufficient the rough mating conditions that exist with charging plugs at the same time Provision of a sufficient restricted area and a variety of coding options.

In addition, the invention relates to a charging connector set with Coding pen system according to one of claims 1 to 10. This is characterized in that that the first connector parameter characterizes the charging voltage, that the first Coding state of the second connector parameter characterizes a dry charging system and that the second coding state of the second connector parameter Features wet loading system. While especially when used in industrial trucks a universal coding pin is arranged on the vehicle, so that both wet and Dry batteries can also be used in this, can be essentially maintained same blocking area compared to a doubling of the coding possibilities reach coding systems used in this area. This allows increase the number of possible voltages of the different batteries, so that in Also in the future batteries with voltages that have not yet been reached, with the same size may be encompassed by the coding system.

For the sake of completeness, it should be noted that the connector parameters are arbitrary are interchangeable as long as this results in a reasonable coding by means of the invention can be achieved.

Fig. 1

eine perspektivische Darstellung einer Ausführungsform eines Codierstifts,

Fig. 2

eine Querschnittsdarstellung zweier übersteckbarer Codierabschnitte für ein Trockenladesystem,

Fig. 3

eine Querschnittsdarstellung zweier übersteckbarer Codierabschnitte eines Naßladesystems mit gleicher Spannungscodierung wie das Trockenladesystem aus Fig. 2,

Fig. 4

eine Querschnittsdarstellung zweier übersteckbarer Codierabschnitte, wobei ein Codierabschnitt eines Naßladesystems mit einem Universalcodierabschnitt übersteckt ist,

Fig. 5

eine Querschnittsdarstellung zweier übersteckbarer Codierabschnitte, wobei ein Codierabschnitt eines Trockenladesystems mit einem Universalcodierabschnitt übersteckt ist und die gleiche Spannungscodierung wie in Fig. 4 vorliegt,

Fig. 6

eine Querschnittsdarstellung einer Überlagerung bei fehlerhaftem Steckversuch von Naß- und Trockenladesystem bei kleinstmöglicher Sperrfläche,

Fig. 7

eine Querschnittsdarstellung, die die kleinstmöglich auftretende Sperrfläche bei einem bekannten Codiersystem mit sechskantförmigen Befestigungsabschnitt zeigt,

Fig. 8

eine Querschnittsdarstellung eines bekannten Codiersystems, die die kleinstmögliche Sperrfläche bei der Verwendung eines achtkantigen Befestigungsabschnitts zeigt,

Fig. 9

eine Querschnittsdarstellung eines Trockenladesystems, die die kleinstmögliche Sperrfläche bei der Verwendung eines Zwölfkants zeigt,

Fig. 10

eine Querschnittsdarstellung ähnlich Fig. 9 bei der Verwendung eines Achtkants,

Fig. 11

eine Querschnittsdarstellung ähnlich Fig. 9 bei der Verwendung eines Sechskants,

Fig. 12

eine Querschnittsdarstellung eines Trockenladesystems bei der Verwendung eines Zwölfkants,

Fig. 13

eine Querschnittsdarstellung ähnlich Fig. 12 bei der Verwendung eines Achtkants,

Fig. 14

eine Querschnittsdarstellung ähnlich Fig. 12 bei der Verwendung eines Sechskants,

Fig. 15

ein Querschnittsvergleich der minimalen Sperrflächen, die sich aus den Fig. 6 bis 7 und 12 bis 14 ergeben,

Fig. 16

eine Querschnittsdarstellung, durch die die Ausgestaltung einer Variante eines Universalcodierabschnitt erläutert ist, und

Fig. 17

eine Darstellung der Hälfte der zusätzlich gewonnenen Querschnittsfläche des Codieraschnitts im Vergleich zur Variante aus Figur 4 und 5.

Exemplary embodiments of the present invention are explained in more detail below with reference to a drawing. Show it:

Fig. 1

2 shows a perspective illustration of an embodiment of a coding pin,

Fig. 2

2 shows a cross-sectional representation of two plug-in coding sections for a dry loading system,

Fig. 3

2 shows a cross-sectional illustration of two plug-in coding sections of a wet charging system with the same voltage coding as the dry charging system from FIG. 2,

Fig. 4

2 shows a cross-sectional illustration of two plug-in coding sections, a coding section of a wet charging system being plugged with a universal coding section,

Fig. 5

3 shows a cross-sectional illustration of two plug-in coding sections, a coding section of a dry charging system being plugged with a universal coding section and having the same voltage coding as in FIG. 4,

Fig. 6

1 shows a cross-sectional representation of an overlay in the event of an incorrect plug-in attempt by the wet and dry charging system with the smallest possible restricted area,

Fig. 7

2 shows a cross-sectional illustration which shows the smallest possible blocking area in a known coding system with a hexagonal fastening section,

Fig. 8

2 shows a cross-sectional illustration of a known coding system, which shows the smallest possible blocking area when using an octagonal fastening section,

Fig. 9

2 shows a cross-sectional illustration of a dry loading system, which shows the smallest possible restricted area when using a twelve-sided,

Fig. 10

9 shows a cross-sectional illustration similar to FIG. 9 when using an octagon,

Fig. 11

9 shows a cross-sectional illustration similar to FIG. 9 when using a hexagon,

Fig. 12

2 shows a cross-sectional illustration of a dry loading system when using a twelve-sided,

Fig. 13

12 shows a cross-sectional illustration similar to FIG. 12 when using an octagon,

Fig. 14

12 shows a cross-sectional illustration similar to FIG. 12 when using a hexagon,

Fig. 15

6 shows a cross-sectional comparison of the minimum blocking areas which result from FIGS. 6 to 7 and 12 to 14,

Fig. 16

a cross-sectional view through which the configuration of a variant of a universal coding section is explained, and

Fig. 17

a representation of half of the additionally obtained cross-sectional area of the coding section in comparison to the variant from FIGS. 4 and 5.

Since the installation and arrangement of a coding pin in a charging connector in general e.g. from EP 0 354 582 B1 is known in detail to the description the charging connector and its receptacle for insertion and fastening of the coding pin waived and referenced in this regard to the prior art.

In Fig. 1, a coding pin 1 is shown, which along its coding pin axis A in a Fastening section 2 with a polygonal cross section and a coding section 3 divided is. Is located between the fastening section 2 and the coding section 3 As a rule, a securing section 4 with a reduced cross section, which is for the axial Secure in the housing of a charging connector is used. The axial securing e.g. via locking lugs that snap into the securing section 4. In the present In this case, the fastening section 2 has an octagonal cross section. The reception facility in the charging connector then essentially comprises an octagonal Opening into which the fastening section 2 can be inserted essentially with a precise fit is. At this point, however, it should be noted that the fastening section 2 any Can have cross-section, the plugging by a predetermined angular amount rotated about the coding pin axis A in the receptacle of the charging connector housing allows. Preference is given to cross-sections which make repositioning in uniform Allow angular steps, as is the case with a polygon cross section. At An octagon thus has eight coding positions available, that of the fastening section are specified. Coding pin 1 can be turned 45 ° around the coding pin axis A rotated into different coding positions in the receiving device arrange.

Like the fastening section 2, the coding section 3 has its entire length a constant and not with respect to its angular position to the coding pin axis A. changing cross section. The coding section 3 comprises a coaxial to the coding pin axis A extending cylindrical jacket-shaped outer surface 5 and one in width Encoding surface 6 running transversely and in length parallel to the coding pin axis A. The coding surface 6 has an S-shaped contour profile in cross section, so that the coding surface 6 a wave crest 7 and a wave trough 8 are formed. The Wellenberg 7 and the trough 8 also have their entire length in the direction of the coding pin axis A has the same cross section on the contour of the crest 7 and of the wave crest 8 are designed such that the contour of the wave crest 7 axisymmetric to the contour of the trough 8 with respect to the coding pin axis A is designed. A small deviation is only provided so that the Wave crest 7 of a complementary coding section of an associated coding pin in the trough 8 is receivable.

Also important for the coding is the angular position of the coding surface 6, which is about the Coding pin axis A is rotated and their arrangement with respect to the mounting portion 2. The angular position of the coding surface 6 with respect to the fastening section 2 was, as already explained above, in the prior art to distinguish wet and Dry loading systems used.

The coding will now be explained in more detail with reference to FIGS. 2 and 3. 2 are the two cross sections of coding sections 3 shown for the identification of a Dry loading system are provided. The reference numeral 31 denotes the coding section for a dry cell battery that is inserted in a charging connector. This coding section 31 is one with a coding section 41 of a coding pin 1 Charging connector of a charging station for dry batteries can be plugged. The angular position, which occupy the coding sections 31 and 41 with respect to the mounting section 2 provides the voltage coding. Accordingly, the coding sections 31 and 41 can only be plugged if the voltage coding for a dry charging system is the same acts. In the case of other voltage encodings, the cross sections are then in each case arranged rotated about the coding pin axis A.

It can also be seen from FIG. 2 that the two cross sections are more complementary Add coding sections 31 and 41 to a circular cross-section. Here is the Wave crest 7 of the coding section 31 in the wave trough 8 of the coding section 41 and the wave crest 7 of the coding section 41 in the wave trough 8 of the coding section 31. Less a number of roundings 9 and 10 due to manufacturing, the area corresponds to each coding section 31 and 41 of half the circular cross-sectional area. The contour course of the coding surfaces 6 of these coding sections 31 and 41 is for the dry loading system reversed or mirror-inverted S-shaped. The coding sections 31 and 41 are completely axisymmetric with respect to one another with respect to the coding pin axis A. The turning point of the inverted S-shaped contour of the coding surface 6 is in in the immediate vicinity of the coding pin axis A.

3 shows the cross-sectional relationships of pluggable coding sections 51 and 61 of a wet charging system. The coding section 51 belongs to a coding pin 1 one Charging connector of a wet battery, whereas the coding section 61 to the coding pin 1 of an associated charging connector of a charging station for wet batteries heard. Both coding sections 51 and 61 are in turn complementary to one another designed and have the same voltage coding. The difference to the Coding sections 31 and 41 of Fig. 2 is that the coding pin sections 31 and 51 are arranged mirror-symmetrically to one another if they have the same voltage coding exhibit. The contour profile of the coding surfaces 6 of the coding sections 51 and 61 is therefore S-shaped and therefore opposite to the coding for Dry loading systems. This is a coding to distinguish dry and Wet loading systems achieved. The coding sections 41 and 61 are also mirror-symmetrical arranged if they have the same voltage coding. The Mirror symmetry results from a theoretical overlay of the cross-sectional areas e.g. of the coding sections 31 and 51 so that the coding pin axes A to cover to be brought. Then is mirrored by a plane that the coding pin axis A completely contains. This plane E is shown in cross section in FIG. 6 and will be explained again there.

4 and 5 it is clear that due to the cross-sectional configuration of the Coding section 31 for the dry cell and coding section 51 for the wet cell, with the same voltage coding, there is the possibility of a universal coding section 11 to design, both with the coding section 31 and with the Coding section 51 can be plugged with the same voltage coding. The cross section of the universal coding section 11 results from a superimposition of the cross sections of the coding sections 31 and 51 and is due to the remaining cross section between the mutually facing wave valleys 8 defined. The universal coding section 11 fills then completely the trough 8 of the coding sections 31 and 51 respectively. This is used for a connector on an industrial truck that is connected to the charging connector the dry cell or the wet cell should be pluggable. The The distinction between dry and wet charging systems is only for the charging process decisive, whereas it is irrelevant for the industrial truck whether it is is a dry or wet battery. Only the voltage coding has to be ensured become. The universal coding section 11 therefore has a predetermined angular position with respect to the coding pin axis A, which corresponds to the angular positions of the coding sections 31 and 51 is matched and can only be plugged with these if the same voltage coding is present. The universal coding section 11 also faces like the others Coding sections a constant cross-section over its entire length and this is also followed by a fastening section of the same design 2 on.

6 shows a situation in which a coding section 61 of a charging connector a charging station for wet batteries with a coding section 32 of a dry battery charging connector. The coding section 32 is not only faulty with regard to the coding of the wet or dry loading system, but also regarding the voltage coding. This situation was chosen around the smallest possible barrier area 12, which is the confusion of dry and Wet loading systems can occur.

6 that the coding sections 61 and 32 differ from one another Dry and wet loading systems due to a mirror symmetry with respect to plane E. mark, whereby the corresponding coding is achieved.

7 to 15, a comparison of the blocking effects of that described above will now be made Coding pen system carried out with the prior art.

In Fig. 7, reference numeral 13 shows the smallest barrier area which is in the state the technology can occur when coding using halved hexagon cross sections. This blocking area 13 is also shown in bold in FIG. 15 in the column "6 positions" and should be viewed as a 100% restricted area for comparison. It is about this around the minimal blocking area existing in practice with charging plug systems. At the comparison now made means "6 positions", "8 positions" or "12 positions" always the number of edges that the fastening section 2 has and thus gives the Number of transfer options in the receiving device.

8 shows why an octagon is generally not used is coming. Here, the smallest barrier area 13 'is only 68.5% from the barrier area 13 Fig. 7. With some violence, a hiding place could be used in rough everyday practice success. At least the security is not enough for practical purposes.

In addition, it should also be mentioned that in the blocking areas according to FIGS. 7 and 8 these continuously spread from the center outwards, which also increases the strength distributed relatively unevenly.

9 to 11 relate to a coding pin arrangement of a dry loading system and FIGS. 12 to 14 show the coding pin arrangement of a wet charging system.

11 and 14, the smallest barrier area 12 is shown, which is in use a hexagon as fastening section 2. A comparison with the restricted area 13 shows that this is more than twice as large (216%).

10 and 13, an octagon is used as the fastening section 2 been so that a smallest barrier area 12 can occur, which is still about 1.5 times is as large as the blocking area 13 from FIG. 7.

It is even possible to use a twelve-sided as fastening section 2, so that a smallest barrier area 12 is obtained, which is approximately the same size as the barrier area 13 from FIG. 7.

For the sake of completeness, it should be noted that the blocking surface 12 from FIG. 6 is more than is twice as large as the blocking area 13 from FIG. 7. This is also at the very bottom of the middle column (Fig. 15).

From the above it follows that for the voltage coding in the above described Coding pen system 12 voltage codes are possible without sacrificing the size of the restricted area 12 must be accepted. In the state of the art only half as much voltage coding is possible, not to be neglected is the fact that the doubling of the voltage encodings is not leads to losses in terms of coding for wet and dry loading systems. For both Systems each have twelve voltage codes available.

The smallest blocking areas 12 shown in FIGS. 9 to 14 only occur when Charging connectors of the same charging system (wet or dry) with different ones Voltage coding should be inserted improperly. The blocking area 12 is thereby crescent-shaped and, starting from the coding pin axis A, very soon takes on a considerable one Width, so that also a more even distribution of force on the locking surface 12 occurs during a mismatch attempt.

Regarding the area comparison of the blocking area 13 with the blocking areas 12 is still It should be noted that the coding pins have the same outside diameter the diameter of the polygon cross sections is defined by the corners. The size relationships of FIGS. 7 to 14 can therefore be regarded as true to scale become.

In these figures it can also be seen that the coding sections in a housing section 13 are arranged, which has an opening 14 whose diameter only is slightly larger than the outside diameter specified by the coding sections Circular cross section. As a result, each coding section can only move slightly to the side dodge due to a force in the area of the locking surface 12, so that this remains essentially fully effective.

16 and 17 a variant is shown in which by a larger coverage of the coding sections 31 and 51 is a universal coding section which is larger in cross section 11 is formed. Both the coding section 31 and the coding section 51 are compared to the corresponding coding sections 31 and 51 from FIGS. 2 to 5 have been rotated by 11.25 ° around the coding pin axis A, so that an opening angle β of 77.5 ° compared to 55 ° according to Figures 4 and 5 is formed. The universal coding section This gives 11 a slightly different cross-sectional shape, but with an increase in area is achieved. This increase in area occurs symmetrically. In Fig. 16 is the simple area enlargement compared to the previously described embodiment shown. This is a factor of 2 enlarged scale. 15 shows very clearly how the cross section of the universal coding section is 11 from the superimposition of the cross sections of the coding sections 31 and 51 results. This enlargement of the cross section of the universal coding section 11 can by rotating the coding sections 31 and 51 about the coding pin axis A can be enlarged further. However, there are limits here for all types of coding there must be sufficient security. It is therefore not essential recommended about the shape of the universal coding section shown in FIG. 16 11 go out.

Important for the overlay according to FIG. 16 and the design of the universal coding section 11 from FIGS. 4 and 5 is that it is in the coding sections 31 and 51 are shapes arranged mirror-symmetrically to the plane E, which the represent the same voltage coding for wet and dry.

The shape of the coding sections shown in FIGS. 2 and 3 (on the one hand 31 and 41 and on the other hand 51 and 61) can also be called a Yin-Yang division.

Claims (12)

Coding pin system for plug connectors for coding at least a first plug connector parameter and a second plug connector parameter, with at least two pluggable coding pins (1), each coding pin (1) having a fastening section which can be used in a plurality of predetermined angular positions rotated about the coding pin axis (A) in a receiving device of a plug connector component (2) and a coding section (3, 31, 32, 41, 51), which with a coding section (3, 31, 32, 41, 51, 61) of another coding pin (1) for coding the same first and second connector parameters can be plugged in such a way that coding surfaces (6) of the coding sections, which run parallel to the coding pin axis (A), lie essentially on top of one another, the coding pin sections for coding the first connector parameter being arranged in a predetermined angular position relative to the fastening section (2) about the coding pin axis (A) , characterized thereby Chnet that a first area of the coding surface (6) is formed by a wave crest (7) running parallel to the coding pin axis (A) and a further area by a wave trough (8) running parallel to the coding pin axis (A), the contour profile of the surface of the The wave crest (7) and the contour of the surface of the wave trough (8) are essentially axisymmetric to the coding pin axis (A), and that the second connector parameter is characterized by two coding states, the wave crest (7) and the wave trough (8 ) of the coding pin (1) for the crest (7) and trough (8) of a coding pin (1) in the second coding state are arranged substantially mirror-symmetrically to a plane which contains the coding pin axis (A) essentially completely. Coding pen system according to Claim 1, characterized in that the contour profile of the coding surface (6) perpendicular to the coding axis (A) for the second coding state is S-shaped and the contour profile of the coding surface (6) perpendicular to the coding axis (A) for the first coding state is a mirror image of S- is shaped. Coding pin system according to claim 1 or 2, characterized in that the entire cross section of a coding section (3, 31, 32, 41, 51, 61) to the entire cross section of a pluggable coding section (3, 31, 32, 41, 51, 61) essentially is axially symmetrical to the coding pin axis (A). Coding pin system according to claim 3, characterized in that two slip-on coding sections (3, 31, 32, 41, 51, 61) together form essentially a circular cross-section, each coding section having a cross-sectional area substantially the size of half the area of half the circular cross-section. Coding pin system according to one of the preceding claims, characterized in that a coding pin (1) is provided with a universal coding section (11) which can be plugged into the coding section (31, 51) for coding a same first connector parameter and independently of the coding state of the second connector parameter, whose angular position with respect to the fastening section and its cross-sectional size result from the size and position of the free cross-section, which, when the cross-section of the coding section (31) overlaps for the first connector parameter and the first coding state of the second connector parameter and the cross-section of the coding section (51) for the same first connector parameter and second coding state of the second connector parameter remains free. Coding pin system according to Claim 5, characterized in that the two superimposed cross sections on the outer circumference of the circular cross section leave a circular arc section which, starting from the coding pin axis (A), has an opening angle (β) of at least 60 °, preferably 85 °. Coding pin system according to one of claims 1 to 6, characterized in that the fastening section (2) has a shape such that it can be inserted into the receiving device in predetermined angular steps about the coding pin axis (A). Coding pin system according to Claim 7, characterized in that the fastening section (2) has a polygonal cross section. Coding pin system according to Claim 7, characterized in that the fastening section has a star-shaped cross section. Coding pin system according to one of Claims 1 to 9, characterized in that the fastening section (2) has a shape so that it can be inserted into the receiving device in at least 8, preferably 12, coding positions. Charging connector with a plug and a socket, each one with the other slip-on coding pin of the coding pin system according to one of claims 1 include up to 10. Charging connector set with a coding pin system according to one of claims 1 to 10, characterized in that the first connector parameter characterizes the charging voltage, that the first coding state of the second connector parameter characterizes a dry charging system and that the second coding status of the second connector parameter characterizes a wet charging system.

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